RM 620 Refinement Study from the Colorado River Bridge to US 183
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TxDOT is conducting a refinement study on RM 620 from the Colorado River bridge to US 183. The purpose of the RM 620 Refinement Study is to further analyze and develop mobility improvements identified in the previous RM 620 Feasibility Study conducted in 2017.


In Feb. 2017, TxDOT completed the RM 620 Feasibility Study from US 183 to SH 71 in Travis and Williamson Counties. The 18.8-mile study resulted in short, mid- and long-term options. The public provided feedback through section working groups, an online questionnaire with more than 3,000 responses and extensive meetings with local business, government and business groups.

The results of the RM 620 Feasibility Study found that motorists traveling on RM 620 experience significant traffic-related delays during morning and afternoon peak travel times. The resulting congestion and existing road configuration diminishes safety and hampers efficient mobility.

RM 620 South, from SH 71 to Oak Grove Boulevard, received funding to expand to a six-lane roadway with a raised median and turn bays. The section between SH 71 and Hudson Bend Road is undergoing environmental study and schematic design, and scheduled to start construction in 2023, contingent on right of way and utilities.

RM 620 North, extending 9.8 miles from the Colorado River bridge to US 183, requires additional study. This segment of RM 620 is a four-lane undivided roadway with a continuous center-turn lane. The corridor serves as a wildfire emergency evacuation route and provides connectivity to major roadways including RM 2222/Bullick Hollow Road, Anderson Mill Road/RM 2769, SH 45N and US 183. The segment of RM 620 between RM 2222 to US 183 will carry a greater projected travel load than RM 620 South and is anticipated to need a minimum of ten lanes.

Project Limits Map

Considerations in Current Effort

The RM 620 Refinement Study takes a closer look at RM 620 from the Colorado River bridge to US 183. The goal of the study is to reduce delay, improve mobility, accommodate pedestrian/bike traffic and enhance safety. This study will analyze right-of-way needs, the human and natural environment, construction costs, constructability, as well as economic and social impacts. Roadway configuration considerations may include expanding at ground level, utilizing elevated structures or a combination of both. At its conclusion, this study will recommend a concept for RM 620 and an implementation plan for long-term improvements.

As part of this study effort, TxDOT will be coordinating with state and local officials from Travis and Williamson Counties as well as the cities of Austin and Cedar Park.

Schedule (subject to change)

Additional stakeholder community meetings will be conducted at strategic planning milestones according to the schedule below 

Additional Resources

Contact Us

RM 620 TxDOT Public Engagement Officer
PO Box 15426
Austin, TX 78761-5426



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