Description: The project includes widening the existing undivided two-lane FM 3349 and CR 101 roadways into a four-lane divided roadway with bridges over U.S. 79 and the Union Pacific Railroad. The project will also construct a new interchange between U.S. 79 and FM 3349/CR 101.
The project is part of the county's Long-Range Transportation Plan and is being funded through a combination of the Williamson County voter-approved 2019 Road Bonds and the TXDOT Austin District.
The design engineers were HDR and BGE. Schematic plans and a final environmental assessment (EA) are available at the links below.
Status: Construction began in fall 2022 on the interim project, which is scheduled to be open to traffic in summer 2025. James Construction is the contractor. The ultimate project may be built in phases over several decades, as the county grows, and funding becomes available. For more information on the Southeast Loop, please visit our Southeast Loop page.
Traffic Change: Williamson County and TxDOT's FM 3349 at U.S. 79 project will soon undergo temporary traffic pattern changes. This temporary flow of traffic is planned to increase safety for motorists until the permanent overpasses are constructed. Drivers on FM 3349 and CR 101 will no longer proceed straight or make a left turn through the intersection at U.S. 79. Drivers will make a right turn onto U.S. 79, followed by a U-turn at the median. Drivers on U.S. 79 will be able to turn onto CR 101 or FM 3349 at the same location. However, the median will be widened to accommodate larger vehicles and raised medians with delineators will be added to separate turning movements.
Phase 1 (PNG) will include pavement widening, raised medians, signing, and striping to indicate the new traffic pattern and will open as soon as spring 2023. Phase 2 is planned for installation of traffic signals to U.S. 79 at the locations shown in the exhibit. Other temporary traffic pattern changes will occur as construction continues to progress.
The final phase (PNG) of the FM 3349 at U.S. 79 project is under construction and expected to open summer 2025. This phase will widen the existing undivided two-lane FM 3349 and CR 101 roadways into a four-lane divided roadway with bridges over U.S. 79 and the Union Pacific Railroad. The project will also construct a new interchange between U.S. 79 and FM 3349/CR 101.