Work begins July 24 at Parmer Lane and I-35 and other transportation updates for Northwest Austin


Here’s a look at what transportation projects are happening in Northwest Austin area.

Featured project

I-35 at Parmer Lane

TxDOT breaks ground July 24 on the project to construct a diverging diamond interchange, in which vehicles cross over to the opposite side of the road to facilitate more efficient turning movements. TxDOT has awarded the contract for the project, and construction is expected to begin sometime this summer. The project also includes adding turn lanes at the intersection of Parmer and North Lamar Boulevard.

Timeline: July 2019-mid-2021
Cost: $32.5 million
Funding source: TxDOT

Ongoing projects

The city of Austin is still in the design phase for expanding Spicewood Springs Road between Loop 360 and west of Mesa Drive. Plans could include expanding the road to four lanes with a median and turn lanes. The $17 million project is being funded through the 2016 Mobility Bond.

Timeline: 2022 (construction begins)

Design work is still underway to make $7.26 million worth of improvements to Anderson Mill Road between Spicewood Parkway and US 183. City staffers expect to have an update later this summer. Improvements could include adding turn lanes, sidewalks and medians.

Timeline: 2020-21 (construction)

Travis County is planning to host a second community meeting in August for residents to preview the preliminary design the county selects for a new bridge at the Spicewood Springs Road low-water crossing No. 1. Design is about 20% complete on the project, which could cost between $3.2 million and $4.1 million.

Timeline: summer 2020 (construction begins)

Latest updates

MoPac construction

Work on the MoPac express lane project, including the sound walls, finished in July. The project added one managed-toll lane, which is variably priced, between Parmer Lane and Cesar Chavez Street.

Timeline: October 2013-July 2019
Cost: $230 million
Funding sources: various local sources

I-35 projects

Crews finished six columns for the bridge beams on the northwest corner of I-35 and US 183. Demolition wrapped in June on the St. Johns Avenue bridge. TxDOT officials expect the new bridge to open in late summer. Drivers on St. Johns must turn right onto the I-35 frontage roads and use the U-turns at US 183 or Hwy. 290 East to access St. Johns on the other side of I-35 during reconstruction of the bridge.

Timeline: January 2018-mid-2021
Cost: $124 million
Funding source: TxDOT

I-35 and Braker Lane upgrades

The city of Austin finished a safety project that included a raised median on Braker west of I-35 to manage turn movements, an extended turn lane for vehicles turning left onto the northbound I-35 frontage road, and new sidewalks and crosswalks.

Timeline: January-June 2019
Cost: $1.23 million
Funding source: 2016 Mobility Bond

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  1. Alesia Landeros

    My neighborhood backs up to RM 620 and is close to Hwy 183. We received stakeholder letters (RM 620 Corridor Refinement) from TXDOT earlier this month stating that they are going ahead with projects identified in the 2017 feasibility study. A new survey is underway and closes on 8/2. Should they go ahead with the expansion of RM 620 between Hwy 183 and Anderson Mill Road, it will Cedar Park businesses vs. Austin homes in areas. Who will lose?

  2. I too am affected by this proposed widening of Hwy. 620. Thirty years ago, when this expansion was first proposed, we in the residential area were told that if federal money was used in the expansion, the rule was, commercial property was to be taken before residential. I don’t know if that was true then, or still applies today. Regardless, the residential area, especially in section 1 was in place long before the commercial area built up on the Cedar Park side. Probably who wins will be decided on who has the loudest voice. It was a shouting match between the Anderson Mill Mud and Cedar Park during the first go around and it ended in a stalemate and nothing happened. Traffic, of course, has gotten much worse since then. The Anderson Mill Mud is also inside the city limits of Austin now too. So, we’ll see…

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Amy Denney
Amy has been reporting in community journalism since 2007. She worked in the Chicago suburbs for three years before migrating south and joined Community Impact Newspaper in September 2010. Amy has been editor of the Northwest Austin publication since August 2012 and she is also the transportation beat reporter for the Austin area.
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