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SH
                      151 San Antonio Area Freeway System
State Highway 151 (Raymond E. Stotzer Jr. Freeway)

This page last updated January 01, 2010

SH 151 highlight map This page covers State Highway (SH) 151 from US 90 to Loop 1604 in western San Antonio.

Length: 10 miles


On this page:


Description

SH 151 connects rapidly-growing far western Bexar County to Loop 410 and also to downtown via US 90.  It is the main corridor through the exploding Westover Hills area, which includes Sea World of Texas; the Hyatt Hill Country Resort; back-office operations for Wachovia, Chase, and the Hartford Group; Maxim integrated products plant; the National Security Agency campus; QVC service center; BABN Technologies; Capital Group/American Funds headquarters; Microsoft and Lowes data centers; Northwest Vista College; and a Santa Rosa hospital.  This route also serves the Southwest Research Institute and Port San Antonio.  At the western end of the corridor is the sprawling but still fledgling Alamo Ranch development.  Residential and commercial construction is booming in the corridor with major retail hubs at Loop 410 and Loop 1604.

Inside Loop 410, nearly all of the land fronting the corridor is undeveloped.  Outside of 410, much of the frontage is still undeveloped, but this is rapidly changing to a mix of suburban commercial, retail, and residential.


Roadway details

LANES
  • 4 lanes along entire route
ACCESS ROADS

Continuous access roads along entire route.  These access roads originally served as the main highway before the construction of the freeway mainlanes.
 

EXITS

Click here for a list of SH 151 exits
 

SPEED LIMITS
  • 65 mph along entire route
SPECIAL FEATURES & NOTES
  • No directional interchange at Loop 410
  • The interchange at US 90 only facilitates traffic from westbound US 90 to SH 151 and to eastbound 90 from SH 151

SH 151 special features map
 

TRAFFIC

Generally moderate. Traffic counts have increased dramatically over the past decade, especially after the freeway mainlanes opened in 2004.  The western end has seen particularly astronomical increases.
 

Traffic volume legend

SH 151 traffic map
 

AVERAGE ANNUAL DAILY TRAFFIC
LOCATION 1990 1998 2000 2006 2007 2008 '98-'08
% CHG
N of US 90 25,000 30,000 32,000 43,000 42,000 51,000 +70%
E of Loop 410 10,200 15,200 27,000 24,000 58,000 60,000 +295%
E of Potranco Rd. 16,100 32,000 23,000 49,000 81,000 77,000 +141%
W of Potranco Rd. 7,300 22,000 23,000 37,000 37,000 67,000 +205%
E of Loop 1604 4,100 7,600 8,600 15,400 15,100 41,100 +439%


Construction projects

No current projects in this corridor.


Future plans

TxDOT had planned to build an underpass for 151 at Loop 1604 starting in Spring 2007, but that project was deferred until early 2012 due to funding constraints.  There are also long-term plans to build a fully-directional interchange at Loop 410 and also to extend 151 all the way to SH 211 in far western Bexar County, the later project currently conceived as part of the regional tollway system.  TransGuide coverage is planned for the future as well.


History

Authorized by Minute Order 81732 (March 14, 1984).  Named for Raymond Stotzer, a longtime TxDOT San Antonio District engineer.  It originally had the moniker "Westside Expressway."  When it was proposed, some maps mistakenly labeled the route as the "Northwest Expressway."  However, at the time, I-10 northwest of downtown officially held this designation (that route was renamed the McDermott Freeway in the mid '90s.)

A request for this general route was made as early as 1956.  It wasn't until the early '80s, however, that any serious proposal surfaced.  Developers of Westover Hills, realizing that a freeway would help spur development in the area, donated land and money to the state for freeway access roads and lobbied officials to build a full freeway.  In 1985, Sea World announced it would build its new theme park in Westover Hills, and state officials quickly approved construction of the 151 access roads from Loop 410 to Loop 1604.  Construction began in late 1985 and was finished in 1987.  Work on the second leg, from Loop 410 to US 90, began in late 1986 and was finished the following year.  In addition to the access roads, overpasses over the future location of the freeway mainlanes were also built at some of the major cross streets near Sea World.  The original construction did, however, include the interchange at US 90.

In 1997, construction was completed on the first short segment of the freeway mainlanes over Ingram and Potranco.  The freeway mainlanes and overpass at Old Highway 90 opened in February of 1998, and the mainlane overpass at Pinn was finished in the summer of 1998.  The overpass at Callaghan and the mainlanes between Callaghan and Old Highway 90 were completed in March 2001.  Modifications to the 151/1604 interchange were made in conjunction with the Loop 1604/Culebra overpass project in late 2003.  At the direction of the Texas Transportation Commission, a study was initiated in early 2003 to determine the feasibility of converting SH 151 to a tollway.  However, due to local political pressure, the tollway proposal was dropped.  The mainlanes from Callaghan to Loop 410 were completed in May 2004 and from Loop 410 to Loop 1604 in September 2004. 



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