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San Antonio Area Freeway System
PROJECT INFO: Loop 1604 from Potranco to US 90

This page last updated March 20, 2017


Project locationLocation: Loop 1604 from Potranco Rd. to US 90

Status: Under construction (3% 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 an underpass at Dove Canyon/Falcoln Wolf, expanding the existing overpass at Marbach, and adding continuous access roads and entrance and exit ramps.  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 orignially designed to eventually be expanded to an expressway as described above; this will expedite the work a bit, reduce the project's cost, and minimize disruption to traffic.

This project will also build a direct connector flyover from SB Loop 1604 to EB US 90 and the existing cloverleaf ramp from SB Loop 1604 to EB US 90 will be removed.  The existing signalized intersections at US 90 will remain, but a second overpass for Loop 1604 over US 90 will be built-- that new overpass will become the northbound lanes and the existing overpass will used for the southbound lanes.  The divided highway will then end just south of US 90 and merge into the existing two-lane road.

The cost of this project is $64.1 million and is being paid for with local funds from the Alamo Regional Mobility Authority as part of the larger $825 five-year regional transportation plan announced in January 2014.

A separate project on US 90 is converting the US 90 access roads to one-way and building a turnaround from WB to EB US 90 at Loop 1604, which should remove an appreciable amount of traffic from the intersections at Loop 1604.

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.  The connector to US 90 will remove that traffic from the remaining signalized intersections at US 90. 

Timeline: Construction began in early 2017 and is scheduled to be complete in early 2020.  Click here for the latest status.

Schematics: Below are cross sections and full schematics for this project.  The schematics are divided into the northern and southern sections; click on the section 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.)


Other sites of interest
TxDOT - Loop 1604 from US 90 to FM 1957 (Potranco Road)

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

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