State Route 52 (SR 52) is a

state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a ...

San Diego County, California San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fi ...

, that extends from La Jolla Parkway at

Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels through the states of Californ ...

(I-5) in

La Jolla La Jolla ( , ) is a hilly, seaside neighborhood within the city of San Diego, California, United States, occupying of curving coastline along the Pacific Ocean. The population reported in the 2010 census was 46,781. La Jolla is surrounded on ...

San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United State ...

, to SR 67 in Santee. It is a

freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

for its entire length and serves as a major east–west route through the northern part of the city of San Diego. The road connects the major north–south freeways of the county, including I-5, I-805, SR 163, I-15, SR 125, and SR 67. SR 52 passes north of the

Rose Canyon Fault The Rose Canyon Fault is a right-lateral strike-slip fault running in a north-south direction through San Diego County, California.Hart, E.W., Bryant, W.A., Wills, C.J., Treiman, J.A., and Kahle, J.E."Summary Report: Fault Evaluation Program, 1987 ...

before traversing

Marine Corps Air Station Miramar Marine Corps Air Station Miramar (MCAS Miramar) , formerly Naval Auxiliary Air Station (NAAS) Miramar and Naval Air Station (NAS) Miramar, is a United States Marine Corps installation that is home to the 3rd Marine Aircraft Wing, which is the avi ...

(MCAS Miramar). East of Santo Road and west of SR 125, the highway goes through

Mission Trails Regional Park Mission Trails Regional Park is a open space preserve within the city of San Diego, California, established in 1974. It is the sixth-largest municipally owned park in the United States, and the largest in California. Description The park cons ...

, a large open preserve. SR 52 is also known as the Soledad Freeway and the San Clemente Canyon Freeway. Plans for a route between La Jolla and Santee date from 1959, and SR 52 was officially designated in the 1964 state highway renumbering. Construction began in 1966 at the I-5 interchange with Ardath Road leading to La Jolla. It continued with the building of San Clemente Canyon Road, which was later widened to become SR 52. The freeway was completed east to I-805 in 1970, and was built in two stages from there to Santo Road east of I-15; the last phase was completed in 1988. The freeway east of Santo Road encountered delays from environmentalists over the endangered least Bell's vireo, a songbird which faced habitat destruction, as well as those concerned with the destruction of homes and businesses for the freeway

right-of-way Right of way is the legal right, established by grant from a landowner or long usage (i.e. by prescription), to pass along a specific route through property belonging to another. A similar ''right of access'' also exists on land held by a gov ...

. The extension to Mission Gorge Road opened in 1993, and SR 52 was completed to SR 125 in 1998. Funding issues delayed the completion of the entire route until 2011, more than fifty years after construction began; until then, the city of Santee faced traffic snarls. A widening project was completed in 2007 between Santo Road and Mast Boulevard; further expansion has been put on hold due to state budget concerns.

Route description

SR 52 begins just west of I-5 at the eastern end of La Jolla Parkway. Before entering

San Clemente Canyon San Clemente Canyon is a canyon located in the city of San Diego, in San Diego County, California.Marian Bear Memorial Park, a linear open space park, is along the canyon and in the southern tributary arroyos and mesa. Park The canyon and Marian ...

, part of Marian Bear Natural Park, the road becomes a freeway as it intersects I-5. The freeway runs north of the

, composed of

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', t ...

rock estimated to be 90 million years old, and

Mount Soledad Mount Soledad, also known as Soledad Mountain, is a prominent landmark in the city of San Diego, California, United States. The mountaintop is the site of the Mount Soledad Cross, the subject of a 25-year controversy over the involvement of reli ...

. Following exits with Clairemont Mesa Boulevard / Regents Road and Genesee Avenue, SR 52 intersects I-805 before exiting the canyon and traveling along the southern edge of the

MCAS Miramar Marine Corps Air Station Miramar (MCAS Miramar) , formerly Naval Auxiliary Air Station (NAAS) Miramar and Naval Air Station (NAS) Miramar, is a United States Marine Corps installation that is home to the 3rd Marine Aircraft Wing, which is the av ...

military base. From I-805 to SR 163, the highway goes through an area with visible

Pliocene The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58SR 163, a freeway heading towards downtown San Diego. SR 52 intersects Kearny Villa Road before an interchange with I-15. A collector-distributor road serves these three interchanges. After this interchange, the freeway leaves the edge of the military base and enters the San Diego neighborhood of

Tierrasanta Tierrasanta, Spanish for "holy land," or "holy ground", is a community within the city of San Diego, California. The symbol of Tierrasanta is an encircled Conquistador cross, similar to one atop Montserrat (mountain) near Barcelona, Spain, though ...

, where there is a junction with Santo Road, before traversing

, an open space preserve, for a few miles. The freeway ascends to Mission Trails Pass, north of the summit of Fortuna Mountain. The mountain is part of the Peninsular Range; the highway cuts through

Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "da ...

rocks estimated to be 50 million years old and marine

fossils A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...

. The road on the eastern side of the mountain is carved out of "igneous granitic rocks" that are thought to be 150 million years old, an unusual formation compared to the Eocene layer. A dedicated two-way bicycle path exists on the northern side of the roadway between Santo Road and Mast Boulevard, with access possible from both termini. East of the Mast Boulevard interchange, SR 52 crosses and begins to parallel the

San Diego River The San Diego River is a river in San Diego County, California. It originates in the Cuyamaca Mountains northwest of the town of Julian, then flows to the southwest until it reaches the El Capitan Reservoir, the largest reservoir in the river ...

. The freeway enters the city of Santee, where SR 52 was built alongside Mission Gorge Road. SR 52 intersects the northern end of SR 125, where SR 52 traffic can exit south onto SR 125. The freeway continues east through Santee, with interchanges at Fanita Drive, Cuyamaca Street, and Magnolia Avenue, before it comes to an end at SR 67. SR 52 is part of the

California Freeway and Expressway System The California Freeway and Expressway System is a system of existing or planned freeways and expressways in the U.S. state of California. It encompasses both State highways and federal highways in California. It is defined by Article 2 (commen ...

and is eligible for the State Scenic Highway System. In 2016,

Caltrans The California Department of Transportation (Caltrans) is an executive department of the U.S. state of California. The department is part of the cabinet-level California State Transportation Agency (CalSTA). Caltrans is headquartered in Sacra ...

officially designated the segment adjacent to

between Santo Road and Mast Boulevard as a scenic highway. SR 52 is also part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the

Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program ...

. The entire route is known as both the Soledad Freeway and the San Clemente Canyon Freeway. In 2013, SR 52 had an

annual average daily traffic Annual average daily traffic, abbreviated AADT, is a measure used primarily in transportation planning, transportation engineering and retail location selection. Traditionally, it is the total volume of vehicle traffic of a highway or road for ...

(AADT) of 69,000 at the eastern terminus with SR 67, and 103,000 between Convoy Street and SR 163, the lowest and the highest AADT for the highway, respectively.

History

In 1959, Legislative Route 279 was designated as a highway from La Jolla to Santee and incorporated into the California Freeway and Expressway System. In the 1964 state highway renumbering, this became SR 52. However, SR 52 took more than fifty years to be constructed, due to delays in the planning and construction phases.

I-5 to I-805

A public hearing on Legislative Route 279 and on the Ardath Road connection to La Jolla was held on November 15, 1961. At the hearing, there were concerns expressed regarding destruction of vegetation. City and state officials indicated that the Soledad Freeway would be constructed in the northern part of the canyon to minimize environmental damage. On November 9, 1966, the I-5 interchange with Ardath Road opened at the western end of what would become SR 52. The original goal was to connect the interchange with San Clemente Canyon Road, which served as a predecessor to SR 52; plans were to widen the road to four lanes and designate it as SR 52. The connecting ramps were not opened that day because the aluminum

guard rail Guard rail, guardrails, or protective guarding, in general, are a boundary feature and may be a means to prevent or deter access to dangerous or off-limits areas while allowing light and visibility in a greater way than a fence. Common shapes ...

s had not been delivered on time. Estimates indicated that each resident of La Jolla would save 80 hours per year by using Ardath Road. A ramp from southbound I-5 to westbound Ardath Road was never completed because of a hairpin turn that would be necessary due to the towering cliff on the west side of I-5 that Ardath Road ascends as it continues to La Jolla. On November 18, San Clemente Canyon Road was connected to I-5 when the aluminum guard rails arrived and were subsequently installed. San Clemente Canyon Road was not fully opened until 1967. That year, citizens expressed opposition to the construction of the Soledad Freeway because some wanted the land to be used for a park, and did not view the freeway as "necessary." Formal bids began in February 1969 for the first section of SR 52 between I-5 and I-805. The state ordered the construction of this section on April 28, 1969. On Thursday, May 28, 1970, the Soledad Freeway opened, connecting Regents Road and Genesee Avenue with I-5; however, it did not connect to the unopened I-805. The road was built by Kasler, Ball and Yeager for $3.9 million (about $ in dollars). The construction firm deposited dirt into "an unnamed finger canyon" against the conditions of the city permit, and the city ordered the firm to remove it. The section of I-805 from SR 52 to El Cajon Boulevard was scheduled to be dedicated on March 20, 1972. Ardath Road was renamed La Jolla Parkway on October 15, 2002, for two reasons: a nearby residential street was also named Ardath Road, and there was a desire to draw attention to this primary route to downtown La Jolla. This required the city of San Diego to pay $20,000 (about $ in dollars) to replace the signs on SR 52.

I-805 to Santo Road

The second phase of SR 52 from I-805 to past U.S. Route 395 (which became I-15 in 1974) was projected to cost $29.4 million (about $ in dollars). The new freeway was to provide access to Tierrasanta and reduce the traffic on I-8. The U.S. Navy was consulted in the planning process due to the road's proposed routing through

that would provide a delineation against further urban development. There were no concerns expressed at the public hearing on November 17, 1970; however, construction did not begin for more than ten years, as California governor

Jerry Brown Edmund Gerald Brown Jr. (born April 7, 1938) is an American lawyer, author, and politician who served as the 34th and 39th governor of California from 1975 to 1983 and 2011 to 2019. A member of the Democratic Party, he was elected Secretary of St ...

stalled the construction of SR 52 from Santo Road to SR 67. In 1977, the county supervisor, a San Diego City councilman, and the mayors of La Mesa and National City wrote a letter to Brown to ask for the construction of this portion of SR 125 and other freeways, due to concerns about the types of congestion seen in

Los Angeles Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the List of municipalities in California, largest city in the U.S. state, state of California and the List of United States cities by population, sec ...

coming to San Diego due to the incomplete freeway system. San Diego City Councilman Tom Gade wrote a telegram to Caltrans Director Adriana Gianturco about the possible deletions; in response, Gianturco clarified that the plans were only being reconsidered and had not been removed, and a CHC member criticized the tone of the original telegram, calling it "intemperate". In 1984, Leo Trombatore, the Caltrans Director under California governor

George Deukmejian Courken George Deukmejian Jr. (; June 6, 1928 – May 8, 2018) was an American politician who served as the 35th governor of California from 1983 to 1991. Of Armenian descent, Deukmejian was a member of the Republican Party and he also serve ...

, requested to the

California Transportation Commission The California Transportation Commission (CTC) is an independent government transportation commission established in 1978. The CTC replaced and assumed the responsibilities of four prior independent agencies, the California Highway Commission, ...

(CTC) that "formal studies toward this end be initiated immediately. Route 52 has a high statewide priority." The CTC followed the director's wishes, approving the studies. The first part of this phase, from I-805 to Convoy Street, began construction in December 1986. It was dedicated at a community celebration on July 11, 1987, and was scheduled to open to traffic a few weeks later. The first callboxes in San Diego County were installed on SR 52 near Convoy Street on June 20, 1988. On June 30, 1988, SR 52 from Convoy Street to Santo Road opened to traffic. The I-15 interchange was built with state funds from the CTC. In 2000, Hazard Construction Company added a single westbound lane on SR 52 from SR 163 to I-805, a distance of , at a cost of $1.7 million (about $ in dollars). In 2006, the Metropolitan Transit System, in cooperation with the San Diego Association of Governments (SANDAG), Caltrans, and the

California Highway Patrol The California Highway Patrol (CHP) is a state law enforcement agency of the U.S. state of California. The CHP has primary patrol jurisdiction over all California highways and roads and streets outside city limits, and can exercise law enforcem ...

, began a pilot program to run transit buses along the shoulders of SR 52 between Kearny Villa Road and I-805. During

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: o ...

, buses were able to use these shoulders to bypass slow traffic in the main lanes. The trial was considered successful as more than 99 percent of trips arrived on time, customer feedback was favorable and no safety concerns were encountered. On May 9, 2007, the ''

San Diego Union-Tribune ''The San Diego Union-Tribune'' is a metropolitan daily newspaper published in San Diego, California, that has run since 1868. Its name derives from a 1992 merger between the two major daily newspapers at the time, ''The San Diego Union'' and ...

'' published a story which raised reader concerns about a dangerous dip in the freeway. The dip had developed in a section of the highway constructed on top of the Miramar Landfill, and had been caused by trash settling; it was repaired by the next day.

Planning for eastern portion

The planning process for the remainder of SR 52 began as early as 1970, when the initial plan was to route the freeway through the city of Santee along Mission Gorge Road and the San Diego River. Planning was delayed until 1984, along with the construction of the I-805 to Santo Road segment. The City of Santee opposed the original plans, hoping to route the freeway on Prospect Avenue or north of the San Diego River. By April 1985, a second route along Prospect Avenue, proposed by Caltrans, earned the support of the City Council; however, the required demolition of many small businesses led many of those affected to start a petition against this route. On the other hand, there were objections about the "river route" costing approximately $15 million more (about $ in dollars) and cutting through a future "Town Center development". The Lakeside Chamber of Commerce preferred the route along the San Diego River, citing the proximity to that city. The environmental impact report was found to be deficient by the

in late 1986. In January 1987, the Santee City Council voted to commence a study of a more northern route, even though local residents and workers objected that this would postpone construction. In March, the study, done by BSI Inc., supported the Caltrans decision to abandon plans for the northern path due to the increased cost from the "mountainous, undeveloped" terrain. The council voted to support a southern alignment through the town, with both the Prospect Avenue and San Diego River alternatives still viable. In the same month, the mayor of La Mesa, Fred Nagel, started a petition drive supporting the extension of the freeway due to the recurring traffic on I-8. The Caltrans environmental impact report indicated that the Prospect Avenue route would cost $89 million (about $ in dollars), compared to the river route's $121 million (about $ in dollars). The city council of

El Cajon El Cajon ( , ; Spanish: El Cajón, meaning "the box") is a city in San Diego County, California, United States, east of downtown San Diego. The city takes its name from Rancho El Cajón, which was in turn named for the box-like shape of the v ...

publicly supported the Prospect Avenue routing; however, some employees of the City of Santee, including some city planners and engineers, were concerned that portions of the report were "outdated." The petitions were given to the CTC in May, when San Diego officials made several arguments in support of the construction. In June 1987, the CTC staff initially recommended against allocating money for the SR 52 segment; however, SANDAG agreed to fund the project with $1 million (about $ in dollars). Residents of Santee opposed the possible routes through the city at a public forum on June 10 because of the necessary destruction of homes to build on those routes. In late June, Caltrans considered making small modifications to the Prospect Avenue alignment to destroy fewer homes, including those in mobile home parks. On June 25, 1987, the CTC voted to support the SR 52 extension, with the requirement that $4.8 million (about $ in dollars) come from local funding sources. Finally, on September 23, the City of Santee recommended the Prospect Avenue Route to the CTC. BellsvireoF1

In July 1987, the

U.S. Fish and Wildlife Service The United States Fish and Wildlife Service (USFWS or FWS) is an agency within the United States Department of the Interior dedicated to the management of fish, wildlife, and natural habitats. The mission of the agency is "working with othe ...

expressed concerns that construction near the San Diego River crossing might result in the destruction of the endangered least Bell's vireo habitat. Two of the four alternative routes considered by Caltrans passed through the Carlton Hills golf course, which the public opposed. In April 1988, the

Sierra Club The Sierra Club is an environmental organization with chapters in all 50 United States, Washington D.C., and Puerto Rico. The club was founded on May 28, 1892, in San Francisco, California, by Scottish-American preservationist John Muir, who be ...

denounced the Prospect Avenue route; federal negotiators recommended shifting the route from Hollins Lake towards the golf course. Environmental concerns raised in June 1988 related to the least Bell's vireo included decrease of insects, a darker environment after overpasses are constructed, and the fragmenting of habitat. Nevertheless, Caltrans still desired the Prospect Avenue route over concerns of a more expensive and less traveled northern route. Upset because of the delays, the Santee City Council wrote to U.S. senators

Pete Wilson Peter Barton Wilson (born August 23, 1933) is an American attorney and politician who served as the 36th governor of California from 1991 to 1999. A member of the Republican Party, he also served as a United States senator from California bet ...

and

Alan Cranston Alan MacGregor Cranston (June 19, 1914 – December 31, 2000) was an American politician and journalist who served as a United States Senator from California from 1969 to 1993, and as a President of the World Federalist Association from 1949 t ...

, asking for their assistance. Councilman Jim Bartell alleged that the issue would affect the city council elections. In March 1989, the Fish and Wildlife Service agreed to the project, on the conditions of altering the route to cross the San Diego River and pass east of the center of the town, and constructing 44 acres of additional habitat as

mitigation Mitigation is the reduction of something harmful or the reduction of its harmful effects. It may refer to measures taken to reduce the harmful effects of hazards that remain ''in potentia'', or to manage harmful incidents that have already occur ...

. SANDAG voted against building a full bicycle lane along the route in July 1989, citing the high costs. Finally, on July 27, the final routing of SR 52 was determined, running along Prospect Avenue. In May 1990, Santee councilman Roy Woodward was censured for having a

conflict of interest A conflict of interest (COI) is a situation in which a person or organization is involved in multiple interests, financial or otherwise, and serving one interest could involve working against another. Typically, this relates to situations i ...

in voting to support the proposals for the freeway because he "held interests" in three properties that would benefit from the freeway, thus violating the

Political Reform Act The Political Reform Act (Act 1/1977, of 4 January, for the Political Reform) This new segment ended just southeast of the Mast Boulevard interchange, after the San Diego River overpass. The opening of this stretch of SR 52 had many effects on the transportation of the East County region. Traffic decreased significantly on I-8 in early 1994, with an estimated 30,000 commuters switching from I-8 to SR 52. Fewer cars traveled on the western part of Mission Gorge Road, leading to a decrease in revenue for businesses located along that road. On Mast Boulevard and Mission Gorge Road in Santee, much more traffic was present, leading to residents complaining to the city. In 1998, the city began to widen Mission Gorge Road between Carlton Hills Drive and Fanita Road to handle the extra traffic from the incomplete SR 52. The year after the

September 11, 2001 attacks The September 11 attacks, commonly known as 9/11, were four coordinated suicide terrorist attacks carried out by al-Qaeda against the United States on Tuesday, September 11, 2001. That morning, nineteen terrorists hijacked four commerc ...

, the military erected a fence to block a deer tunnel underneath the freeway that connected the base and Mission Trails Regional Park, since the tunnel could be used to gain unauthorized access to the base. In 2006, construction began to add a third lane on westbound SR 52 between Mast Boulevard and Santo Road. The expansion cost $3.4 million (about $ in dollars) and was funded by the state and the county TransNet sales tax. The new lane opened on May 8, 2007; however, the widening generated complaints from angry commuters facing a "bottleneck" at Santo Road. Because the additional lane was constructed in portions, the opening of the third lane between Santo Road and the existing third lane closer to I-15 was delayed; however, construction for the missing was approved in April 2007. The extension opened on July 20, 2007.

Mission Gorge Road to SR 67

Construction on the next portion of SR 52, from Mission Gorge Road to SR 125, was scheduled to begin in late 1995, at a total cost of $60 million (about $ in dollars) for the entire project. Property acquisition began in 1994, with many property owners along the south side of Mission Gorge Road being forced to move out of the way of the freeway and subsequent road construction, as Mission Gorge Road was moved south to accommodate the new freeway. About $40 million ($ in dollars) was spent on the property acquisition. After weather-related construction delays due to the

El Niño El Niño (; ; ) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (approximately between the International Date L ...

season of the winter of 1997–1998, the extension of SR 52 between Mission Gorge Road and SR 125 was dedicated on May 9, 1998. The eastbound lanes were scheduled to be opened a few days later, and the westbound lanes were to be opened in mid-July of that year. L.R. Hubbard Construction Company built the portion for $17 million (about $ in dollars). The city of Santee faced problems in the construction of the freeway from SR 125 to SR 67. As early as 1995, it was clear that the environmental impact report was delayed and that there would be funding difficulties. SANDAG allocated $23 million dollars (about $ in dollars) in 1999 to purchase properties needed for the

. In 2001, SANDAG gave $138 million (about $ in dollars) to the expansion of SR 52 to SR 67, which was necessary for extending the freeway past Cuyamaca Street. But by 2003, the transportation committee of SANDAG voted to delay the project due to decreased state funding. The city of Santee was required to make improvements to Forester Creek to accommodate potential flooding, which cost $30 million (about $ in dollars); the work began in May 2006. Funding issues were finally resolved in 2006 with voter-approved statewide transportation bonds. In 2007, highway construction costs increased; that year, the SANDAG transportation committee voted to fund the construction, taking money from a planned reversible lanes project on SR 52. "Heavy construction" of SR 52 from SR 125 eastward to SR 67 began in February 2008. More than 360 properties were acquired to build the freeway; at least 60 were mobile homes. This portion was divided into three construction projects: from SR 125 to Cuyamaca Street, from there to Magnolia Avenue, and the interchange with SR 67, which began construction in mid-June 2008. The middle project had to be shut down briefly in February 2009 due to funding issues. Completion was scheduled for 2010, but was postponed to early 2011 due to weather-related delays. This new portion was opened to traffic on March 29, 2011. The cost of this project was $525 million, funded with state and federal funds as well as TransNet revenue. The opening was predicted to reduce traffic on I-8 as well as Mission Gorge Road and other Santee thoroughfares. The official "ribbon cutting" ceremony took place on March 19, 2011 on the freeway at the Cuyamaca Street interchange. Reactions to the extension between SR 125 and SR 67 were mixed. There were reports of faster transportation through the East County area, yet commuters noted a rush hour backup at SR 125 headed westbound because there were only two lanes traveling west through the interchange. Traffic along Mission Gorge Road was reported to have decreased by 20 percent.

Future

There are plans to add one lane in each direction, as well as two reversible lanes, from I-15 to SR 125. These plans were put on hold in 2008 due to a budget shortfall. Completion is scheduled to take place by 2040. Caltrans recommends adding two more lanes between I-5 and I-805, and two

HOV lanes A high-occupancy vehicle lane (also known as an HOV lane, carpool lane, diamond lane, 2+ lane, and transit lane or T2 or T3 lanes) is a restricted traffic lane reserved for the exclusive use of vehicles with a driver and one or more passengers, i ...

between I-805 and I-15.

Exit list

References

External links

{{commonscat
California @ AARoads.com – State Route 52Caltrans: Route 52 highway conditions
052 Roads in San Diego County, California Transportation in San Diego 052 052