US-79 Urban Arterial Expansion – Texas Department of Transportation

Travis County Texas

LAN performed schematic design for the expansion of US-79 from IH-35 to 2.5 miles east, converting a 5-lane roadway into a 6-lane divided highway with dedicated turn lanes. This critical infrastructure project was designed to improve traffic flow and safety along a key urban arterial route.

The redesign included three innovative interchanges: a displaced left Turn at IH35, a partial cloverleaf at SP379, and a tight urban diamond at FM1460, each tailored to optimize traffic movement and minimize congestion. Utilizing advanced traffic modeling, LAN’s team developed effective signalization and interchange layouts to support growing traffic volumes.

In addition to traffic enhancements, the project addressed drainage and accessibility, integrating comprehensive stormwater management systems and 10-foot shared use paths that meet ADA standards, promoting pedestrian and cyclist safety.

Strategic planning and design minimized environmental and community impacts, avoiding displacements and preserving local heritage. LAN’s team achieved considerable cost savings, enhancing the project’s value and ensuring completion within budget and on schedule.

The US79 urban arterial expansion demonstrates LAN’s capability to deliver high-impact transportation projects that meet the needs of modern urban environments.

At a glance

Schematic design

5 mile highway expansion

Innovative interchanges

Traffic modeling


Drainage improvements

Accessibility improvements


Displaced left turn

Partial cloverleaf

Tight urban diamond


Schematic Design


Texas Department of Transportation