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I-35 at RM 1431


The project included the construction of a Diverging Diamond Intersection, which is an innovative intersection to alleviate an existing bottleneck at the intersection of RM 1431 and I-35. The project also included construction of a southbound collector-distributor road, or intersection bypass lane, and ramp improvements.

Need & Purpose

  • Improve safety and mobility

Project Description

  • Replaced traditional intersection with a Diverging Diamond Intersection
  • Added southbound intersection bypass lane


  • Traditional development by TxDOT
  • Construction cost estimate: $6.6 million


  • Finalized schematic and environmental documentation: April 2014
  • Begin Plans, Specifications and Estimates (PS&E): February 2013
  • Construction letting: June 2014
  • Construction start: October 2014
  • Construction completion: May 2016


Project Vicinity Map

RM 1431 map


Public Information Officer
(512) 832-7000

TxDOT Austin District
P.O. Box 15426
Austin, TX 78761-5426

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