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[i] Information SAN ANTONIO FREEWAY HISTORY
Read my essay on San Antonio's freeway history for the Express-News' Tricentennial series here. The full history of the freeway system is available on this site here.

San Antonio Area Freeway System
PROJECT INFO: Loop 1604 from Culebra to Potranco

This page last updated March 20, 2017

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Project locationLocation: Loop 1604 from Culebra Rd. to Potranco Rd.

Status: Under construction (29% complete)

Description
This project will upgrade Loop 1604 at this location from a four-lane divided highway to a four-lane, toll-free expressway. This includes adding
overpasses at Wiseman Blvd., Military Dr. West, and Potranco Rd. (FM 1957), continuous access roads, and entrance and exit ramps. The discovery of a sensitive karst feature along the western edge of the right-of-way between Wiseman and Military will necessitate a short bow in the corridor. Otherwise, the expansion will be completed by converting the existing northbound lanes to the northbound access road, converting the existing southbound lanes to northbound expressway lanes, and constructing the remaining lanes (southbound expressway and access road.) Unbeknownst to most motorists, the existing divided highway was originally designed to eventually be expanded to an expressway as described above; this will reduce costs, expedite the work a bit and minimize disruption to traffic.

The cost of this project is $62.5 million and is being paid for with local funds from the Advanced Transportation District as part of the larger $825 five-year regional transportation plan announced in January 2014.

How this project will help
Staggering ongoing growth in this area of San Antonio necessitates upgrading this roadway. The new expressway lanes with overpasses at the currently signalized intersections will allow for continuous free-flowing traffic through the corridor.
The four expressway lanes are anticipated to handle the projected traffic in this corridor for the next 20 years.

Timeline
The official groundbreaking occurred on September 12, 2016. Construction began in October 2016 and should be complete in mid 2019.  Click here for the latest status report on this project.

FAQ:

  • Why are the new sections of Loop 1604 only four lanes? It needs to be six lanes or more.
    The number of lanes for a new roadway is based on current and projected traffic volumes for the next 20 years. Twenty years is the accepted planning horizon for a couple of reasons. First, that's the length of time before a road will need major repairs and upgrades simply due to age (i.e. the road's expected lifespan). Second, that length of time is the longest that any projections can be considered even remotely reasonable. Since nobody has a crystal ball, traffic projections are "educated guesses" based on the best data available for future development in an area and past growth. Roads are then planned based on those projections. In the case of the new segments of Loop 1604, those projections show that four lanes will be adequate for the 20 years. TxDOT, as a steward of taxpayer dollars, cannot spend more than they can justify, a policy I'm sure most taxpayers support, especially with all the other needs that need to be funded.

Schematics
Below are cross sections and full schematics for this project. Click on one of the schematic images below to see an annotated overview schematic of each segment of this project. These plans are courtesy of TxDOT and are subject to change. Annotations are my own.


 (Note: the schematics below are somewhat large and may take a few seconds to open.)

Northern half (Kilmarnoch to SH 151) (1.49 MB)

 

Southern half (S of Potranco to Kilmarnoch) (1.43 MB)


 


Other sites of interest
TxDOT - Loop 1604 from FM 1957 to FM 471
http://www.txdot.gov/inside-txdot/projects/studies/san-antonio/loop1604-fm1957-fm471.html




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This page and all its contents are Copyright 2017 by Brian Purcell

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The information provided on this website is provided on an "as-is" basis without warranties of any kind either express or implied.  The author and his agents make no warranties or representations of any kind concerning any information contained in this website.  This website is provided only as general information.  The author expressly disclaims all liability with respect to actions taken or not taken based upon the information contained herein or with respect to any errors or omissions in such information.  All opinions expressed are strictly those of the author.  This site is not affiliated in any way with any official agency.