U.S. Highway 181 is a south–north

U.S. Highway The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these h ...

located entirely in the state of

Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...

. Both termini are at

Interstate 37 Interstate 37 (I-37) is a Interstate Highway located within the southern portion of the US state of Texas. The highway was first designated in 1959 as a route between Corpus Christi and San Antonio. Construction in the urban areas of C ...

, the road that it mainly parallels to the east. US 181 begins in

Corpus Christi, Texas Corpus Christi (; Ecclesiastical Latin: "'' Body of Christ"'') is a coastal city in the South Texas region of the U.S. state of Texas and the county seat and largest city of Nueces County, it also extends into Aransas, Kleberg, and San Patrici ...

at mile marker 0 to the south, through south-central Texas to just south of

San Antonio ("Cradle of Freedom") , image_map = , mapsize = 220px , map_caption = Interactive map of San Antonio , subdivision_type = Country , subdivision_name = United States , subdivision_type1= U.S. state, State , subdivision_name1 = Texas , s ...

to the north (mile marker 131), for a total length of 137 miles (220 km). The highway's northern terminus is at an intersection with Interstate 37 one mile (1.6 km) south of San Antonio's

Interstate 410 Interstate 410 (abbreviated I-410, and colloquially called Loop 410) is a loop route of I-10 around San Antonio, Texas. It is identified as Connally Loop in honor of former Texas Governor John Connally. Route description I-410 c ...

loop, about 12 miles (19 km) northwest of

Floresville Floresville is a city in Wilson County, Texas, United States. According to the U.S. Census Bureau, the population was at 7,203 at the 2020 Census. It is the county seat of Wilson County. The city is also part of the San Antonio Metropolitan Statis ...

. Prior to the Interstate era, US 181 traveled into

Downtown San Antonio Downtown San Antonio is the central business district of San Antonio, Texas, United States. It also serves as the urban core of Greater San Antonio, a metropolitan area with nearly 2.5 million people. In addition to being encircled by Loops 1604 ...

along Presa St. to an intersection with its parent route,

US 81 U.S. Route 81 or U.S. Highway 81 (US 81) is a major north–south U.S. highway that extends for in the central United States and is one of the original United States Numbered Highways established in 1926 by the American Association of Stat ...

, which then ran along Alamo St. Its southern terminus is in

near the

Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ...

. IH 37 and US 181 have mutual termini, such that traffic traveling southbound on IH 37 will automatically merge onto northbound US 181, and vice versa.

Route description

Proceeding northbound, US 181 runs through the following Texas counties: Nueces, San Patricio, Bee, Karnes, Wilson, and Bexar. At its southern terminus with Interstate 37 in Corpus Christi, TX, US 181 traverses as a freeway in the northeast direction across Harbor Bridge and the Nueces Bay Causeway, before entering Portland, TX. Past the Nueces Bay Causeway through Portland, US 181 shares a duplex with Texas State Highway 35. Immediately after Portland is Gregory, where US 181 and TX 35 splits, and the freeway portion of US 181 ends. SH 35 proceeds eastbound to Aransas Pass and Rockport while US 181 proceeds northwest towards Taft and Sinton. US 181 shares a duplex with SH 188 and US 77 Business in Sinton, and makes a right turn at San Patricio Street, proceeding northbound. North of Sinton, US 181 passes through the towns of St. Paul, Papalote, and Skidmore, before reaching Beeville. US 181 business runs through downtown Beeville while drivers passing by can use the US 181 freeway bypass on the east side of town. In Beeville, US 181 intersects with

US 59 U.S. Route 59 (US 59) is a north–south United States highway (though it was signed east–west in parts of Texas). A latecomer to the U.S. numbered route system, US 59 is now a border-to-border route, part of the NAFTA Corridor Highway Sy ...

(Future

I-69W Interstate 69W (I-69W) is a relatively short north–south Interstate Highway running through South Texas in the United States. The freeway begins northeast of the middle of World Trade International Bridge in Laredo and ends at I-35. In ...

) (northbound to Victoria/Houston & southbound to Laredo). North of Beeville US 181 passes through a number of unincorporated towns including Normanna, Pettus, and Tuleta before reaching Kenedy. US 181 business serves downtown while US 181 runs on the west side of town. Immediately north of Kenedy is Karnes City, where US 181 business runs parallel again east of US 181 through Karnes City. North of Karnes City US 181 passes through Hobson (unincorporated), followed by Falls City, Poth, and Floresville. US 181 business runs west of US 181 through downtown Floresville. North of Floresville US 181 passes through the town limits of Elmendorf before intersection with State Loop 1604 (Anderson Loop, surrounding San Antonio), and ends 8 miles north at its northern terminus at I-37, just south of I-37 and I-410 on San Antonio's far south side.

History

US 181 is one of the original routes accepted by

AASHO The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test quality control, protocols, and guidelines that are used in highway design and construction through ...

in November 1926. Its original southern terminus was at a junction with its parent, US 81, and US 90 in

. By 1968, the portion between Downtown and Loop 13 had been removed from the state highway system. The completion of I-37 in San Antonio during the 1970s resulted in the truncation of US 181 to its interchange with that freeway; the segment north of this point along Presa Street was transferred to Spur 122.

Major intersections

Auxiliary routes

US 181 has

business routes A business route (or business loop, business spur, or city route) in the United States is a short special route connected to a ''parent'' numbered highway at its beginning, then routed through the central business district of a nearby city or ...

Beeville Beeville is a city in Bee County, Texas, United States, with a population of 12,863 at the 2010 census. It is the county seat of Bee County and home to the main campus of Coastal Bend College. The area around the city contains three prisons oper ...

, Kenedy, and

Karnes City Karnes City is a city in and county seat of Karnes County, Texas, United States. The population was 3,111 at the 2020 census, up from 3,042 at the 2010 census. The town was named after Henry Karnes of the Texas Revolution. Karnes is sout ...

. The routes are previous alignments of US 181 through these cities, and were previously designated in the state highway system with other route numbers. The designations were changed to Business US 181 by TxDOT in 1991. A ''de facto'' fourth route, along a former alignment through

, is designated Loop 181.

Beeville business route

Business US 181 in Beeville travels through central Beeville while mainline US 181 uses a freeway bypass to the east of the city. It is officially designated by TxDOT as Business US 181-J, and was designated as Loop 516 on May 31, 1973 (which was signed as a business route of US 181), but was changed to Business US 181-J on June 21, 1990.

Kenedy business route

Business US 181 in Kenedy travels through central Kenedy while mainline US 181 passes to the west of the city. It is officially inventoried by TxDOT as two separate routes, with a discontinuity at SH 72. *The southern segment, from US 181 northward to SH 72, is designated as Business US 181-G, and was formerly Spur 259 from September 25, 1952 until June 21, 1990, but was signed as business US 181. *The northern segment, from SH 72 northward to US 181, is designated as Business US 181-F, and was formerly Spur 258 from September 25, 1952 until June 21, 1990, but was signed as business US 181. Although not officially concurrent with SH 72, the signage in the area directs traffic from one segment to the other, effectively completing the loop.

Karnes City business route

Business US 181 in Karnes City travels northward and then westward through central Karnes City while mainline US 181 skirts the southwestern edge of the city. It is officially inventoried by TxDOT as two separate routes, which connect at the intersection with SH 80 / SH 123 in the east side of the city. *The southern segment, from US 181 northward to SH 80/123, is designated as Business US 181-E. The route was previously part of SH 80, but it still signed as SH 80/123 to facilitate access to SH 80/123 for traffic from northbound US 181. *The northern segment, from SH 80/123 westward to US 181, is designated as Business US 181-D. The route was previously part of FM 1144.

Floresville Loop 181

US 181's former alignment in Floresville is inventoried as Loop 181 by TxDOT. The route was designated on October 15, 1946 when US 181 was realigned to the east. The route begins north of the city limits; within the city, it has a brief concurrency with FM 536 and intersects SH 97 before rejoining US 181 in the southeastern section of the city.

References

External links

Endpoints of US highway 181
{{DEFAULTSORT:81-1 United States Numbered Highway System U.S. Highways in Texas

U.S. Route 181 U.S. Highway 181 is a south–north U.S. Highway located entirely in the state of Texas. Both termini are at Interstate 37, the road that it mainly parallels to the east. US 181 begins in Corpus Christi, Texas at mile marker 0 to the south ...