I-35 At SH 123 Project Moves Into Next Phase Of Development In San Marcos

• Reconstruct and improve the SH 123 traditional interchange

• Reverse four ramps along the northbound frontage road between SH 80 and RM 12

• Reverse one entrance ramp along the southbound frontage road between SH 80 and SH 123

• Realign the existing southbound exit ramp to SH 123 (CM Allen Parkway)

• Relocate the entrance ramp along the southbound frontage road from SH 80

• Reconstruct portions of the northbound and southbound frontage roads, including improving bicycle and pedestrian accommodations

• Reconstruct the frontage road bridges over Willow Springs Creek

• Raise and reconstruct the northbound frontage road bridge over the San Marcos River

• Widen the southbound frontage road bridge over the San Marcos River

• Reconstruct the mainlanes and bridge over SH 123

• Add auxiliary lanes, or extended entrance/exit lanes, to the mainlanes and frontage roads

Funding

• Project development funded by TxDOT
• Construction funded by Capital Metropolitan Planning Organization (CAMPO) and TxDOT
• Construction cost estimate: $107 million

Schedule

• Finalized schematic and environmental documentation: anticipated late 2017
• Begin Plans Specifications and Estimates (PS&E) documentation: anticipated late 2017
• Complete PS&E: anticipated early 2020
• Construction letting: anticipated early 2020
• Construction start: anticipated mid-2020
• Construction completion: anticipated late 2022