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Interstate 45 (I-45) is a major
Interstate Highway The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...
located entirely within the US state of Texas. While most Interstate routes which have numbers ending in "5" are cross-country north–south routes, I-45 is comparatively short, with the entire route located in Texas. Additionally, it has the shortest length of all the interstates that end in a "5." It connects the cities of Dallas and Houston, continuing southeast from Houston to Galveston over the Galveston Causeway to the Gulf of Mexico. I-45 replaced U.S. Highway 75 (US 75) over its entire length, although portions of US 75 remained parallel to I-45 until its elimination south of Downtown Dallas in 1987. At the south end of I-45, State Highway 87 (SH 87, formerly part of US 75) continues into downtown Galveston. The north end is at I-30 in Downtown Dallas, where US 75 used the Good-Latimer Expressway. A short continuation, known by
traffic reporters Traffic reporting is the near real-time distribution of information about road conditions such as traffic congestion, detours, and traffic collisions. The reports help drivers anticipate and avoid traffic problems. Traffic reports, especially in ...
as the I-45 overhead, signed as part of US 75, and officially I-345, continues north to the merge with the current end of US 75. Traffic can use State Highway Spur 366 (Spur 366, better known locally as the Woodall Rodgers Freeway) to connect to I-35E at the north end of I-345. The portion of I-45 between downtown Houston and Galveston is known to Houston residents as the Gulf Freeway. The short elevated section of I-45, which forms the southern boundary of downtown Houston, is known as the Pierce Elevated after the surface street next to which the freeway runs, while north of I-10 it is known as the North Freeway. I-45 and I-345 in the Dallas area, north of the interchanges with
I-20 Interstate 20 (I‑20) is a major east–west Interstate Highway in the Southern United States. I-20 runs beginning at an interchange with I-10 in Scroggins Draw, Texas, and ending at an interchange with I-95 in Florence, South Carolina. Between ...
and SH 310 (old US 75), is the Julius Schepps Freeway. The Gulf Freeway and North Freeway both include reversible high-occupancy vehicle (HOV) lanes for busses and other high-occupancy vehicles to and from downtown Houston. The freeway is the subject of ongoing controversy and federal investigation due to a proposed expansion project in Harris County, which would displace hundreds of people from their homes and worsen air quality. The local authorities have opposed the expansion project, while the Texas Department of Transportation (TxDOT) supports expansion, and negotiations are pending.


Route description

In addition to the official control cities of Galveston, Houston, and Dallas, I-45 serves a number of other communities, including
La Marque La Marque ( ) is a city in Galveston County, Texas, south of Houston. The city population in 2020 was 18,030. It is a part of the Houston- The Woodlands- Sugar Land metropolitan area. La Marque experienced considerable growth in the 1950s, durin ...
,
League City League City is a city in the U.S. state of Texas, in Galveston County, within the metropolitan area. As of the 2020 census, the city had a population of 112,129. The city of League City has a small portion north of Clear Creek within Harris C ...
,
Spring Spring(s) may refer to: Common uses * Spring (season), a season of the year * Spring (device), a mechanical device that stores energy * Spring (hydrology), a natural source of water * Spring (mathematics), a geometric surface in the shape of a ...
, The Woodlands, Conroe, Willis,
Huntsville Huntsville is a city in Madison County, Limestone County, and Morgan County, Alabama, United States. It is the county seat of Madison County. Located in the Appalachian region of northern Alabama, Huntsville is the most populous city in th ...
, Madisonville, Centerville, Buffalo, Fairfield,
Corsicana Corsicana is a city in Navarro County, Texas, United States. It is located on Interstate 45, 56 miles northeast of Waco, Texas. The population was 23,770 at the 2010 census. It is the county seat of Navarro County, and an important Agri-business ...
, and
Ennis Ennis () is the county town of County Clare, in the mid-west of Ireland. The town lies on the River Fergus, north of where the river widens and enters the Shannon Estuary. Ennis is the largest town in County Clare, with a population of 25,27 ...
. US 190 joins I-45 for from
Huntsville Huntsville is a city in Madison County, Limestone County, and Morgan County, Alabama, United States. It is the county seat of Madison County. Located in the Appalachian region of northern Alabama, Huntsville is the most populous city in th ...
to Madisonville. US 287 joins I-45 for from
Corsicana Corsicana is a city in Navarro County, Texas, United States. It is located on Interstate 45, 56 miles northeast of Waco, Texas. The population was 23,770 at the 2010 census. It is the county seat of Navarro County, and an important Agri-business ...
to
Ennis Ennis () is the county town of County Clare, in the mid-west of Ireland. The town lies on the River Fergus, north of where the river widens and enters the Shannon Estuary. Ennis is the largest town in County Clare, with a population of 25,27 ...
. US 287 signs are only posted (with I-45) from the northern end of
Business Interstate 45-F All of the business loops are maintained by the Texas Department of Transportation (TxDOT). Interstate 45 (I-45) has four business loops in the state, all located in northern Texas. Along I-45, TxDOT identifies each business route as Business Int ...
(Bus. I-45-F) in Corsicana to the Ellis County line. I-45 gained notoriety during
Hurricane Rita Hurricane Rita was the most intense tropical cyclone on record in the Gulf of Mexico and the fourth-most intense Atlantic hurricane ever recorded. Part of the record-breaking 2005 Atlantic hurricane season, which included three of the top ten L ...
in 2005. Thousands of Houston area evacuees jammed the roadway trying to leave. As a result, the freeway became a parking lot. Gas stations ran dry and hundreds of people's cars simply ran empty, their occupants having to spend the night along the shoulder. Four-hour drives suddenly became 24-hour drives. Even though
TxDOT The Texas Department of Transportation (TxDOT ) is a government agency in the United States, American state of Texas. Though the public face of the agency is generally associated with the construction and maintenance of the state's immense state ...
started contraflow lane reversal at
Farm to Market Road 1488 A farm (also called an agricultural holding) is an area of land that is devoted primarily to agricultural processes with the primary objective of producing food and other crops; it is the basic facility in food production. The name is used ...
(FM 1488), it did not alleviate the traffic jam deep into the city, as that starting point was even north of The Woodlands, which is close to Conroe, the northern terminus of the greater Houston area. At just , I-45 is the shortest of the primary Interstates (ending in 0 or 5), and the only primary Interstate to be entirely inside of one state.


Gulf Freeway

The stretch of I-45 connecting Galveston with Houston is known as the Gulf Freeway. It was the first freeway built in Texas—opened in stages beginning on October 1, 1948, up to a full completion to Galveston in 1952, as part of US 75. At the north (Houston) end, it connects to the North Freeway via the short Pierce Elevated, completed in 1967. The section north of the curve near SH 3/Monroe Road in southeastern Houston was built on the right-of-way of the former Galveston–Houston Electric Railway, which entered downtown on Pierce Street. After several interchanges, I-45 crosses the Galveston Causeway and passes
Tiki Island Tiki Island is a village in Galveston County, Texas, United States. The population was 968 at the 2010 census. History and government Tiki Island is largely man-made and was built in the 1960s, when developers dug canals and used the fill to eleva ...
. Old US 75 south of this junction was upgraded on the spot. The Gulf Freeway generally parallels SH 3 (old US 75) about to the west, bypassing
La Marque La Marque ( ) is a city in Galveston County, Texas, south of Houston. The city population in 2020 was 18,030. It is a part of the Houston- The Woodlands- Sugar Land metropolitan area. La Marque experienced considerable growth in the 1950s, durin ...
, Dickinson, and
South Houston South Houston is a city in the U.S. state of Texas, within Houston–The Woodlands–Sugar Land metropolitan area and Harris County. The population was 16,153 at the 2020 census. It is bordered by the cities of Houston and Pasadena, and geo ...
. It includes interchanges with several other freeways:
FM 1764 Farm to Market Road 1764 (FM 1764) is a state highway in the U.S. state of Texas. It is a farm to market road existing entirely within Galveston County that connects Santa Fe to Texas City via a short stretch of freeway known as the Emmett F. L ...
(Emmett F. Lowry Expressway), State Highway NASA Road 1 (NASA Road 1), and the
Sam Houston Tollway Sam, SAM or variants may refer to: Places * Sam, Benin * Sam, Boulkiemdé, Burkina Faso * Sam, Bourzanga, Burkina Faso * Sam, Kongoussi, Burkina Faso * Sam, Iran * Sam, Teton County, Idaho, United States, a populated place People and fictional ...
, meeting the north end of SH 3 in southeastern Houston. (This part of SH 3—on Winkler Drive and Monroe Road—is not part of old US 75.) A center reversible HOV lane begins just south of the Sam Houston Tollway. In Houston, I-45 meets
I-610 Interstate 610 may refer to: * Interstate 610 (Louisiana), an alternate in New Orleans, Louisiana * Interstate 610 (Texas) Interstate 610 (I-610) is a freeway that forms a loop around the inner city sector of the city of Houston, Texas. I-6 ...
and SH 35 at a complicated interchange. At the merge with Spur 5, a short freeway spur to the University of Houston, elevated collector–distributor roads (also part of Spur 5) begin. The collector–distributor roads and the HOV lane end at Emancipation Avenue, the original end of the Gulf Freeway. Just past Emancipation Avenue is an interchange with I-69/ US 59 (Eastex Freeway and Southwest Freeway) and SH 288 (South Freeway), after which I-45 technically becomes the North Freeway as it runs along the northwest half of the block between Pierce Street and Gray Street as the Pierce Elevated. The reversible HOV lane begins in downtown Houston at the intersection of St. Joseph Parkway and Emancipation Avenue, with easy access inbound to St. Joseph Parkway and outbound from Pierce Street. It runs down the
median In statistics and probability theory, the median is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as "the middle" value. The basic fe ...
of the Gulf Freeway, mostly at the same level as the mainlanes. Ramps are provided for access to and from the following roads: * Eastwood Transit Center—full access *
I-610 Interstate 610 may refer to: * Interstate 610 (Louisiana), an alternate in New Orleans, Louisiana * Interstate 610 (Texas) Interstate 610 (I-610) is a freeway that forms a loop around the inner city sector of the city of Houston, Texas. I-6 ...
north frontage road—full access *Monroe Road and Monroe Park & Ride—full access *Fuqua Park & Ride and South Point Park & Ride—full access *Frontage roads north of Dixie Farm Road ( FM 1959)—toward downtown, with a
ramp stub An unused highway is a highway or highway ramp that was partially or fully constructed, but went unused or was later closed. An unused roadway or ramp may often be referred to as an abandoned road, ghost road, highway to nowhere, stub ramp, g ...
for continuation


North Freeway

The I-45 North Freeway HOV begins in downtown Houston near the University of Houston–Downtown, with easy access inbound on Milam Street and outbound on Travis Street. Ramps and entrances are provided for access from the following roads. All are fully accessible. *
I-10 Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally pl ...
/ US 90 westbound exit and entrance only *Quitman Street *Airline Drive (to Crosstimbers Road) *North Shepherd (to North Shepherd Park & Ride) * FM 525 (Aldine-Bender Road) *Kuykendahl Park & Ride *
FM 1960 Farm to Market Road 1960 (FM 1960) is a farm-to-market road in the U.S. state of Texas, maintained by the Texas Department of Transportation. Its western terminus is at an intersection with U.S. Highway 290 (US 290) and State Highway 6 ...
(to Spring Park & Ride) The HOV ends approximately north of the FM 1960 (Cypress Creek Parkway) exit and becomes a diamond white line at grade separated HOV north to just before exit 84 State Highway Loop 336 (Loop 336) on the southside of Conroe. This provides constant HOV access with one lane on the northbound side and one lane on the southbound side with periodic dotted lines for access at major exits.


Julius Schepps Freeway

The stretch of I-45 along the
Julius Schepps Julius Schepps (November 16, 1895 – May 25, 1971) was an American civic leader and businessman. Early life Schepps was born in St. Louis, Missouri to Russian immigrant parents Joe and Jennie (née Nathanson) Schepps. When his parents moved ...
Freeway in Dallas, from the Trinity River to Downtown Dallas up to and including I-345, is elevated above the surrounding areas for most of its length. As such, when ice storms hit the Dallas area (usually on average one to two times per year), the freeway is shut down, and traffic is diverted to SH 310 and
US 175 U.S. Highway 175 (US 175) is a east-west United States Numbered Highway located completely within the state of Texas. It comes very close to meeting its parent route, U.S. Route 75 in Texas, US 75, but decommissioning and rerouting in Downt ...
, which parallel I-45.


History

In the initial assignment of state highways in 1917, Dallas–Fort Worth and Houston were connected by a branch of SH 2 (the Meridian Highway), which ran via Waco and
Bryan Bryan may refer to: Places United States * Bryan, Arkansas * Bryan, Kentucky * Bryan, Ohio * Bryan, Texas * Bryan, Wyoming, a ghost town in Sweetwater County in the U.S. state of Wyoming * Bryan Township (disambiguation) Facilities and structur ...
and continued on to Galveston. The more direct route followed by I-45 was not initially part of the system between Richland and
Huntsville Huntsville is a city in Madison County, Limestone County, and Morgan County, Alabama, United States. It is the county seat of Madison County. Located in the Appalachian region of northern Alabama, Huntsville is the most populous city in th ...
; this cutoff was added by 1919 as SH 32, and US 75 was assigned to the alignment in 1926. Prior to the coming of the Interstate Highway System in the late 1950s, the only improvements to US 75 in Texas beyond building a two-lane paved roadway were in the Houston and Dallas areas. However, the highways in and near these cities included some of the first freeways in the state: the Gulf Freeway (Houston) and the Central Expressway (Dallas).


Gulf Freeway (Houston to Galveston)

The Galveston–Houston Electric Railway began operating an interurban between those cities on December 5, 1911, and last ran on October 31, 1936, though the
Houston Electric Company HouTran was a public transportation company that served the Houston area. While its last iteration was publicly owned by the City of Houston, it was privately owned throughout the vast majority of its existence. Throughout several name changes a ...
, operator of Houston's city transit system, continued to run trains on the portion between downtown and Park Place. A proposal for a "superhighway" between the cities was first made in 1930, and Houston Mayor
Oscar Holcombe Oscar Fitzallen Holcombe (December 31, 1888 – June 18, 1968) was an American businessman who served as the mayor of Houston, Texas, for 22 years, in 11 non-consecutive terms. Biography Holcombe was born in Mobile, Alabama, and raised in San A ...
began to work toward it later that decade. He announced an agreement with the Houston Electric Company on April 12, 1940, through which the company could convert its four remaining lines to busses in exchange for the right-of-way used by the Park Place line. This line was last used on June 9, 1940, the last day of streetcar service in Houston; the replacement is still operated by
METRO Metro, short for metropolitan, may refer to: Geography * Metro (city), a city in Indonesia * A metropolitan area, the populated region including and surrounding an urban center Public transport * Rapid transit, a passenger railway in an urba ...
as the 40 along Telephone Road. Before the new highway was built, US 75 followed Galveston Road (now mostly SH 3), Broadway Street, and Harrisburg Boulevard into downtown Houston. SH 225 carried traffic from La Porte along La Porte Road to US 75 in Harrisburg, and SH 35 connected Alvin with downtown Houston along Telephone Road and Leeland Street. Plans made in October 1943, when the Texas Transportation Commission signed an agreement with Houston and Harris County, referred to the new bypass as a relocation of US 75. Drawings were released by the state on January 31, 1946, and included almost continuous frontage roads, broken only at railroad crossings. Although the freeway ended at Live Oak Street, a so-called "four-street distribution system" of four
oneway street One-way traffic (or uni-directional traffic) is traffic that moves in a single direction. A one-way street is a street either facilitating only one-way traffic, or designed to direct vehicles to move in one direction. One-way streets typical ...
s, timed for , carried traffic to Main Street. Initially, the two southwestern streets—Pierce Street and Calhoun Avenue (now St. Joseph Parkway)—carried traffic toward the freeway, and the other two—Jefferson and Pease Streets—carried exiting traffic; once the freeway was completed far enough to allow US 75 to be marked along it, Pease and Pierce streets carried that highway to Fannin Street. The first freeway dedication in the state took place at 7:00 pm on September 30, 1948, at the overpass over Calhoun Road by the University of Houston. The roadway between downtown and Telephone Road was opened to traffic after speeches, but lacked an official name, being called the "Interurban Expressway", after the rail line that it replaced, by the press. Mayor Holcombe quickly started a contest to assign a name, and the city chose the winning entry on December 17, 1948. Sara Yancy of
Houston Heights Houston Heights (often referred to simply as "The Heights") is a community in northwest-central Houston, Texas, United States. "The Heights" is often referred to colloquially to describe a larger collection of neighborhoods next to and including ...
won $100 (equivalent to $ in ) for her submission of "Gulf Freeway", named for the Gulf of Mexico that the highway would reach when completed. The freeway was extended to Griggs Road in February 1951, Reveille Street (onto which SH 35 was realigned) in July 1951, and was completed to the Galveston Causeway on August 2, 1952, with a ceremony on the bridge over FM 517 near Dickinson. However, beyond Reveille Street, the road was not built to freeway standards, with 32
at-grade intersection An intersection or an at-grade junction is a junction where two or more roads converge, diverge, meet or cross at the same height, as opposed to an interchange, which uses bridges or tunnels to separate different roads. Major intersections a ...
s, though no traffic signals. The highway curved away from the old interurban right-of-way near Monroe Road, about where the Park Place streetcar line had ended. In December 1952, a short spur, now part of
I-610 Interstate 610 may refer to: * Interstate 610 (Louisiana), an alternate in New Orleans, Louisiana * Interstate 610 (Texas) Interstate 610 (I-610) is a freeway that forms a loop around the inner city sector of the city of Houston, Texas. I-6 ...
, was opened to connect with SH 225. A three-way split in the northwest part of Park Place, near where Gulfgate Shopping Center opened in 1956, carried nonstop traffic to and from SH 35 and SH 225. This split was also the location of a lane drop; the roadway carried six lanes (three in each direction) between Houston and the interchange, and four beyond to Galveston. After the new US 75 was completed, the old road between downtown and
South Houston South Houston is a city in the U.S. state of Texas, within Houston–The Woodlands–Sugar Land metropolitan area and Harris County. The population was 16,153 at the 2020 census. It is bordered by the cities of Houston and Pasadena, and geo ...
was dropped from the state highway system, while the remainder became SH 3, connecting to the Gulf Freeway via Winkler Drive, effective August 20, 1952. The first major change was made in preparation for the North Freeway connection, when the directions of Calhoun Avenue and Jefferson Street were swapped so that they would alternate. A bridge, dated 1954, was built to carry traffic from Jefferson Street over traffic to Jefferson Street, and US 75 was moved to Calhoun Avenue northbound, soon crossing downtown on the
oneway pair A one-way pair, one-way couple, or couplet refers to that portion of a bi-directional traffic facilitysuch as a road, bus, streetcar, or light rail linewhere its opposing flows exist as two independent and roughly parallel facilities. Descriptio ...
of Calhoun Avenue and Pierce Street to the new North Freeway. A
median barrier A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic. It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resu ...
was added in 1956 to prevent crossover accidents. Southeast of downtown Houston, the at-grade intersections proved dangerous, and only two had been replaced with interchanges by 1959, when the
Texas Highway Department The Texas Department of Transportation (TxDOT ) is a government agency in the American state of Texas. Though the public face of the agency is generally associated with the construction and maintenance of the state's immense state highway system ...
began a program to upgrade the road to full freeway standards. Frontage roads would be required along the entire highway, since the state had not purchased access rights, and so abutting property owners were able to build driveways to the road. To accomplish this, traffic was shifted to the newly built frontage roads so that the central main lanes could be reconstructed. This grade separation was completed from Houston to Almeda-Genoa Road (exit 34) in June 1959, FM 1959 (exit 30) in October 1964, FM 518 (exit 23) in December 1970, and
FM 1764 Farm to Market Road 1764 (FM 1764) is a state highway in the U.S. state of Texas. It is a farm to market road existing entirely within Galveston County that connects Santa Fe to Texas City via a short stretch of freeway known as the Emmett F. L ...
(exit 15) in 1976. As the section beyond FM 1764 into Galveston had already been rebuilt, this marked the completion of the Gulf Freeway as an actual freeway. As the first freeway in Texas, the standards of the Gulf Freeway soon became inadequate, with poor sight lines and little room to merge when entering. It also attracted development, such as Gulfgate Shopping City, the first mall in the Houston area, the Manned Spacecraft Center, and many residential developments. Heavy congestion began to affect the freeway by the early 1960s; two roughly parallel freeways—the
Harrisburg Freeway Harrisburg is the capital city of the Commonwealth of Pennsylvania, United States, and the county seat of Dauphin County. With a population of 50,135 as of the 2021 census, Harrisburg is the 9th largest city and 15th largest municipality in Pe ...
and
Alvin Freeway State Highway 35 (SH 35) is a state highway in the U.S. state of Texas, maintained by the Texas Department of Transportation (TxDOT). It runs primarily south–north, paralleling the Gulf of Mexico for much of its length, from a junction with I ...
—were proposed at that time to relieve the traffic but were not built. A short project to widen the road to six lanes between I-610 and
Sims Bayou Sims, sims or SIMS may refer to: Games * ''The Sims'', a life simulation video game series ** ''The Sims'' (video game), the first installment, released in 2000 ** ''The Sims 2'', the second installment, released in 2004 ** '' The Sims 3'', th ...
was completed in 1960, and ramp meters were installed in 1966. The I-610 interchange was rebuilt with direct connections for most movements in 1975. Plans to reconstruct the freeway near downtown began in 1972, taking about 170 houses and 22 businesses from the southwest side for the room to expand the main lanes and add parallel lanes for the Alvin Freeway. Local opposition was unsuccessful at stopping the project, and construction on this segment, and others to the southeast, took place in the 1980s. The lanes were shifted outward to make room for the transitway, which opened to I-610 on May 16, 1988. These lanes were inspired by the similar ones on the
Shirley Highway The Henry G. Shirley Memorial Highway, often shortened to Shirley Highway, consists of a portion of Interstates 95 and 395 in the U.S. Commonwealth of Virginia. Shirley Highway was the first limited-access freeway in Virginia. Begun in 1941, th ...
in the Washington Metropolitan Area. That year also marked the end of the reconstruction inside I-610, along with the elevated distribution lanes alongside the mainlanes near downtown; the first short piece of the Alvin Freeway was finally connected to these in 1999. This project gave I-45 its current configuration, mostly eight mainlanes wide, from Sims Bayou past I-610 to Griggs Road in 1981, to Telephone Road in 1982, to Lockwood Drive in 1985, and, finally, to downtown in 1988. However, this was not the end of construction on the Gulf Freeway. The highway beyond I-610 to FM 1959, which had just been upgraded in the 1950s and 1960s, saw an extension of the transitway to a temporary end near FM 1959, widening to eight lanes, and a large
stack interchange A directional interchange, colloquially known as a stack interchange, is a type of grade-separated junction between two controlled-access highways that allows for free-flowing movement to and from all directions of traffic. These interchanges e ...
at the
Sam Houston Tollway Sam, SAM or variants may refer to: Places * Sam, Benin * Sam, Boulkiemdé, Burkina Faso * Sam, Bourzanga, Burkina Faso * Sam, Kongoussi, Burkina Faso * Sam, Iran * Sam, Teton County, Idaho, United States, a populated place People and fictional ...
. This reconstruction was completed between Almeda-Genoa Road and College Avenue in 1991, between College Avenue and Sims Bayou in 1994, and, finally in 1997, there was no construction anywhere on the entire length of the freeway when the tollway interchange was opened, along with the widening between Almeda-Genoa Road and FM 1959. A 1999 study recommended widening the entire stretch from the Sam Houston Tollway to Galveston to at least eight lanes. Construction to replace the Galveston Causeway began in mid-2003, and work on a section through
Webster Webster may refer to: People *Webster (surname), including a list of people with the surname *Webster (given name), including a list of people with the given name Places Canada *Webster, Alberta *Webster's Falls, Hamilton, Ontario United State ...
, including a new interchange with
NASA Road 1 State Highway NASA Road 1 (also NASA Parkway and NASA Road 1) is an east–west state highway that runs from Interstate 45 (I-45) in Webster to State Highway 146/ future State Highway 99 (SH 146/future SH 99) in Seabrook. Th ...
, began in mid-2007. Widening of the freeway between Kurland Drive at Bay Area Boulevard began in July 2011. This construction will expand the number of freeway lanes from six to ten and increase the number of frontage lanes from four to six. The HOV lane will be extended to the southern end of the construction. It will also involve rebuilding the overpasses at Dixie Farm Road and Clear Lake City Boulevard. (Dixie Farm Road bridge demolition has already been completed) According to TxDOT, the project is approximately in length, starting at Kurland and ending approximately south of Bay Area Boulevard. The project has six phases. Phase one is the reconstruction of the mainlanes from the northern end of the project to just south of FM 1959. The end of this phase will include the demolition and reconstruction of the bridge at the FM 1959 intersection. Phase two, planned to begin in mid-2012, will be the reconstruction of the frontage roads from just south of FM 1959 to the southern end of the project. Phase three will be the reconstruction of the mainlanes on the southern half of the project and is planned to begin in mid-2013. Phase four, scheduled to start late 2014, will be the demolition and reconstruction of the overpass at Clear Lake City Boulevard. Phase five, (which was completed) was the demolition and reconstruction of El Dorado Boulevard and Bay Area Boulevard. The demolition and reconstruction was finished in 2016. As a result, the 1960s-era cloverleaf interchanges (with the exception of Fuqua Street and Scarsdale Boulevard) have been eliminated with overpasses. Phase six will be making the new lanes of the freeway. It will have five lanes each direction along with the new overpasses for those two underpasses. This will be completed 2017. In 2015, reconstruction and widening of I-45 began in Downtown Houston due to heavy traffic. The southbound onramp from Allen Parkway will be moved to enter on the right side, and longrange plans call for the demolition of the outdated Pierce Elevated, with the reroute of I-45 being along I-69/ US 59 and
I-10 Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally pl ...
/ US 90 to the North Freeway; The parts of the Gulf Freeway at I-10 and I-45 will be known as the Downtown Connector. If I-45 was rerouted and the Pierce Elevated demolished (and/or redeveloped into the proposed Pierce SkyPark as part of additional greenspace), the connecting ramps south of Allen Parkway would become a second downtown spur, which will result in the demise of a full freeway loop around Downtown Houston. , there are no plans to place the Pierce Elevated in a tunnel similar to Spur 366 in Dallas since the Houston Metro area is prone to flooding, especially in the aftermath of
Hurricane Harvey Hurricane Harvey was a devastating Category 4 hurricane that made landfall on Texas and Louisiana in August 2017, causing catastrophic flooding and more than 100 deaths. It is tied with 2005's Hurricane Katrina as the costliest t ...
.


North Freeway (Houston to Conroe)

The last alignment of US 75 before the North Freeway was built left downtown Houston to the northwest on Main Street, turning north at Airline Drive, and then northwest along the present alignment of I-45, then known as Stuebner Airline Road, Shepherd Drive, and East Montgomery Road. The freeway replacement was authorized in stages between May 1945 and June 1952, when the Texas Transportation Commission adopted plans for a freeway all the way between Houston and Dallas. The North Freeway name was adopted in 1956; an unsuccessful proposal in 1965 would have renamed it the Dallas Freeway. The first short piece of the freeway to open crossed
Buffalo Bayou Buffalo Bayou is a slow-moving body of water which flows through Houston in Harris County, Texas. Formed 18,000 years ago, it has its source in the prairie surrounding Katy, Fort Bend County, and flows approximately east through the Houston Ship ...
, connecting the two
oneway pair A one-way pair, one-way couple, or couplet refers to that portion of a bi-directional traffic facilitysuch as a road, bus, streetcar, or light rail linewhere its opposing flows exist as two independent and roughly parallel facilities. Descriptio ...
s from the north end of the Gulf Freeway with the south end of Houston Avenue. This was opened on December 12, 1955, and allowed US 75 to bypass its run on Main Street; it included interchanges with
Allen Parkway Allen Parkway is an arterial road west of Downtown Houston, Texas. It has a distance of approximately 2.3 miles (3.7 km), running from Interstate 45 west to Shepherd Drive, where it becomes Kirby Drive. Originally known as Buffalo Parkway, ...
and Memorial Drive. The next piece near downtown opened on July 24, 1962, leaving the 1955 freeway in the Allen Parkway interchange, passing east of Houston Avenue, and connected to an already-built portion at
I-610 Interstate 610 may refer to: * Interstate 610 (Louisiana), an alternate in New Orleans, Louisiana * Interstate 610 (Texas) Interstate 610 (I-610) is a freeway that forms a loop around the inner city sector of the city of Houston, Texas. I-6 ...
. The six-lane Pierce Elevated, which occupies half a block on the southwest side of Pierce Street, required the acquisition of a number of commercial properties; the cost prevented the full block from being used. This portion opened on August 18, 1967, connecting the Gulf and North Freeways and bypassing the "four-street distribution system", which remains in its original form to this day. The first piece of the North Freeway to be built outside I-610 was an upgrade of existing US 75 on Stuebner Airline Road, between Airline Drive and Shepherd Drive, opened in December 1959. In April 1961, this was completed to the interchange with I-610, and, on July 24, 1962, the downtown section was extended north to meet it. As each section opened, US 75 was moved to it, temporarily using I-610 to Airline Drive for about a year. At the other end, US 75 was upgraded from
Spring Creek A spring creek is a type of free flowing river whose name derives from its origin: an underground spring or set of springs which produces sufficient water to consistently feed a unique river. The water flowing in a spring creek may additionally be ...
at the north edge of
Spring Spring(s) may refer to: Common uses * Spring (season), a season of the year * Spring (device), a mechanical device that stores energy * Spring (hydrology), a natural source of water * Spring (mathematics), a geometric surface in the shape of a ...
north to the San Jacinto River south of Conroe in 1960. In between, the upgrade was completed from FM 525 to near Richey Road in December 1961, south to the 1959 segment in February 1963, and north to the 1960 segment in March 1963, completing the North Freeway except for the Pierce Elevated (1967). The freeway as initially built had eight lanes (four in each direction) between downtown and I-610, six to
FM 1960 Farm to Market Road 1960 (FM 1960) is a farm-to-market road in the U.S. state of Texas, maintained by the Texas Department of Transportation. Its western terminus is at an intersection with U.S. Highway 290 (US 290) and State Highway 6 ...
, and four north of FM 1960. Like the Gulf Freeway, the North Freeway soon became congested. The
oil boom An oil boom is a period of large inflow of income as a result of high global oil prices or large oil production in an economy. Generally, this short period initially brings economic benefits, in terms of increased GDP growth, but might later lead ...
of the 1970s resulted in large-scale residential development along the highway, most notably The Woodlands. Since the corridor was strongly directional, with 65 percent of peak-hour traffic going in the peak direction, a contraflow lane for busses and other high-occupancy vehicles was implemented later that decade, opening on August 28, 1979, between downtown and Shepherd Drive (exit 56B). The facility, operating during both
rush hour A rush hour (American English, British English) or peak hour (Australian English) is a part of the day during which traffic congestion on roads and crowding on public transport is at its highest. Normally, this happens twice every weekday: on ...
periods, occupied the leftmost lane of the other direction and was separated from the other lanes with a movable pylon every . In 1980, the existing center
breakdown lane A shoulder, hard shoulder (British) or breakdown lane, is an emergency stopping lane by the verge of a road or motorway, on the right side in countries which drive on the right, and on the left side in countries which drive on the left. Many wid ...
s were restriped for HOV traffic for about from the north end of the contraflow lane. However, off-peak traffic was increasing, and construction began in 1983 on a more permanent reversible transitway in the median. Thus, the second transitway in Houston (a month after the one on the
Katy Freeway Katy or KATY may refer to: People * Katy, a short form of the name Katherine * Katy (given name) * Katy (Marvel Cinematic Universe), a fictional character * Katy Perry Places Serbia * Kać, Serbia ( hu, Káty, link=no) United States * Katy, Mi ...
), opened on November 23, 1984, replacing the contraflow lane. Reconstruction of the mainlanes and frontage roads to handle increased traffic began in 1982 just north of downtown. No lanes were added south of I-610, but the eight-lane crosssection, with room for a transitway, was continued north as construction progressed. Work was completed south of Airline Drive (exit 53) in about 1985, to Shepherd Drive (exit 56B) in 1987, and to FM 525 (exit 60A) in 1990; this last opening allowed the transitway to extend to just south of FM 525. The Hardy Toll Road, completed on June 28, 1988, between I-610 and I-45 near The Woodlands, added capacity to that part of the corridor, and, in 1990, reconstruction was completed on a short piece of I-45 from the toll road into The Woodlands. Reconstruction continued from FM 525, reaching Airtex Boulevard (exit 63) in 1997, including part of the
Sam Houston Tollway Sam, SAM or variants may refer to: Places * Sam, Benin * Sam, Boulkiemdé, Burkina Faso * Sam, Bourzanga, Burkina Faso * Sam, Kongoussi, Burkina Faso * Sam, Iran * Sam, Teton County, Idaho, United States, a populated place People and fictional ...
interchange (completed in 2003) and a transitway extension, Cypresswood Drive (exit 68) in 1998, extending the transit way to its present terminus, and the Hardy Toll Road (exit 72) in 2003. Work on the section through The Woodlands to Research Forest Drive (exit 77) was completed in 2001, including a direct connection to Woodlands Parkway, and, in 2003, work was completed to FM 1488 (exit 81). Construction is now complete between FM 1488 to the Walker County line near milepost 100 just south of the northbound truck weigh station and
New Waverly New Waverly is a city in Walker County, Texas, United States. The population was 914 at the 2020 census. Geography New Waverly is located at (30.539226, –95.479862). According to the United States Census Bureau, the city has a total area o ...
, near SH 75 (exit 98). , widening of the North Freeway from Downtown Houston to Sam Houston Tollway began; The plan for the project is to widen the freeway by adding managed lanes and adding the North Shepherd on- and offramps also known as Spur 261 (which was already completed) prior to the I-45 widening project. This project has generated major controversy, with proponents claiming it would "enhance safety and mobility", while opponents point out that it would worsen air quality and greenhouse gas emissions, displace hundreds of people, and fail to meaningfully address congestion. Authorities in Harris County, Texas, have sued
TxDOT The Texas Department of Transportation (TxDOT ) is a government agency in the United States, American state of Texas. Though the public face of the agency is generally associated with the construction and maintenance of the state's immense state ...
to stop the expansion, and the federal government has investigated the expansion project to determine whether it violates any civil rights or environmental laws. Among others, the expansion is opposed by US Representative Sheila Jackson Lee and Harris County Judge
Lina Hidalgo Lina Maria Hidalgo (born February 19, 1991) is an American politician in the state of Texas. She is the county judge of Harris County, the third-most populous county in the United States. Hidalgo is the first woman and the first Latina to be ele ...
. If completed, the highway's width will double to 480 feet, wider than a football field. The highway expansion would displace around a thousand residents, including 919 units in 16 apartment complexes, 160 single-family homes, five places of worship, and two schools. An apartment complex has been acquired and vacated by TxDOT, which plans to demolish it for the expansion. TxDOT was heavily criticized for this planned demolition, as the apartment complex slated for demolition has been described as an example of good urban planning. Parts of the freeway are paralleled by the METRORail Red Line.


Between Conroe and Richland

The first part of I-45 between Conroe and Richland was the bypass around
Huntsville Huntsville is a city in Madison County, Limestone County, and Morgan County, Alabama, United States. It is the county seat of Madison County. Located in the Appalachian region of northern Alabama, Huntsville is the most populous city in th ...
. The final piece of I-45 between the cities opened on October 13, 1971, for between Fairfield and Streetman.


Richland to Dallas (Julius Schepps Freeway)

The Central Expressway was the first freeway in Dallas, built as a new alignment of US 75. It first opened between San Jacinto Street and Fitzhugh Avenue in 1949 and soon stretched south to Hutchins. However, the stretch through downtown ran along the surface, as did the part south of the bridge over the Trinity River, due to diversion of funds to the north portion. By the late 1950s, a bypass to the east of the downtown section was planned. By the time construction reached Hutchins, in about 1955, the state decided to build further segments to full freeway standards. By 1961, the freeway was complete between Hutchins and the SH 14 split at Richland, except for the bypass around
Corsicana Corsicana is a city in Navarro County, Texas, United States. It is located on Interstate 45, 56 miles northeast of Waco, Texas. The population was 23,770 at the 2010 census. It is the county seat of Navarro County, and an important Agri-business ...
, which was built c. 1964. This freeway was mostly built along the existing US 75; one of the projects in
Navarro County Navarro County ( ) is a County (United States), county in the U.S. state of Texas. As of the 2020 United States Census, 2020 census, the population was 52,624. Its county seat is Corsicana, Texas, Corsicana. The county is named for José Anton ...
, near Corsicana, was the first Interstate project in Texas approved under the Federal Aid Highway Act of 1956. It was not until 1964 that I-345, extending I-45 north along the proposed Central Expressway bypass, was added as a proposed state highway. I-45 and I-345 were built and opened in the 1970s, with the final section, between Lamar Street (exit 283A) and the Central Expressway (exit 283B), opening on February 25, 1976. At the north end, before it merged into the Central Expressway (which continued to carry US 75), I-345 straddled the bridges over Bryan Street and Ross Avenue, the latter the location of the opening ceremonies in 1949. Because of their location, these two bridges were not replaced in the 1990s reconstruction of the North Central Expressway and are the only surviving grade separations from the initial construction north from downtown. At the time the interchange with I-20 was built, the freeway that crossed I-45 was then a part of
I-635 Interstate 635 may refer to: * Interstate 635 (Kansas–Missouri), a connector highway between Interstate 35 in Overland Park, Kansas and Interstate 29 in Kansas City, Missouri, signed as the Harry Darby Memorial Highway * Interstate 635 (Texas), ...
; it would not be until later when, initially, I-20 was added to I-635 as a multiplex, then later still, I-635 would be truncated away from the I-45 interchange (back around to just north of what is now I-20's interchange with US 175). Reconstruction and widening to six lanes, from the
Ellis Ellis is a surname of Welsh and English origin. Retrieved 21 January 2014 An independent French origin of the surname is said to derive from the phrase fleur-de-lis. Surname A * Abe Ellis (Stargate), a fictional character in the TV series ' ...
– Navarro county line (between exits 243 and 244) north to SH 310 (exit 275), began in 1991. The last section, near the north end, was completed in 2002.


Exit list


Related routes

*
Interstate 345 Interstate 345 (I-345) is a Auxiliary Interstate Highway in the city of Dallas within the US state of Texas. It is a freeway that connects I-45 (which ends at the interchange with I-30) with U.S. Highway 75 (US 75; North Centra ...
* Texas State Highway 3 * Texas State Highway 75 * Texas State Highway 310 * U.S. Route 75 in Texas *
U.S. Route 175 U.S. Highway 175 (US 175) is a east-west United States Numbered Highway located completely within the state of Texas. It comes very close to meeting its parent route, US 75, but decommissioning and rerouting in Downtown Dallas leaves it sho ...


Notes


References


External links

*
Interstate Guide: I-45I-45 info/history page
€”from dfwfreeways.info
METRO - Gulf Freeway HOV system & map
{{interstates 45 45 Transportation in Galveston County, Texas Transportation in Harris County, Texas Transportation in Montgomery County, Texas Transportation in Walker County, Texas Transportation in Madison County, Texas Transportation in Leon County, Texas Transportation in Freestone County, Texas Transportation in Navarro County, Texas Transportation in Ellis County, Texas Transportation in Dallas County, Texas