North Lamar corridor construction begins and 8 other transportation project updates in Northwest Austin

Corridor improvements throughout the city from the 2016 mobility bond include new traffic signals, sidewalks and bicycle facilities. (Amy Denney/Community Impact Newspaper)
Corridor improvements throughout the city from the 2016 mobility bond include new traffic signals, sidewalks and bicycle facilities. (Amy Denney/Community Impact Newspaper)

Corridor improvements throughout the city from the 2016 mobility bond include new traffic signals, sidewalks and bicycle facilities. (Amy Denney/Community Impact Newspaper)

Image description
(Mel Stefka/Community Impact Newspaper)
1. US 183 North toll project

The Central Texas Regional Mobility Authority will add two express toll lanes in each direction to US 183 between MoPac and SH 45 N. Staffers pitched a proposal Nov. 20 to add a new flyover to allow drivers in the southbound US 183 express lanes to access the MoPac frontage road and get to Spicewood Springs Road, Far West Boulevard or RM 2222. The total cost of the project could increase to $580 million.

Timeline: early 2021-25

Cost: $500 million-$580 million

Funding sources: toll revenue bonds, TxDOT

2. I-35 work

The I-35 project includes adding three flyovers connecting I-35 and US 183 as well as reconstructing the existing northbound I-35 to northbound US 183 flyover. Crews expect to finish work on the columns for that flyover by late 2019.

Timeline: January 2018-mid-2021

Cost: $124.2 million

Funding source: TxDOT

3. Parmer Lane diverging diamond

Construction is underway on the diverging diamond interchange at Parmer Lane and I-35. Crews have cleared the site for the northbound and southbound bypass lanes. In December, they worked on those bypass lanes and removed concrete medians to make room for the new interchange.

Timeline: July 2019-mid-2021

Cost: $32.5 million

Funding source: TxDOT

4. Improving US 183

TxDOT will add new auxiliary, or merge, lanes between Metric Boulevard and Cameron Road; add a main lane on the southbound side; and close the entrance ramp near Georgian Drive. TxDOT expects to award a contract in the spring.

Timeline: spring 2020-21

Cost: $3 million (estimated)

Funding source: TxDOT

5. Improving Anderson Mill Road

City staffers expect to start construction next summer on improvements to Anderson Mill Road between Spicewood Parkway and US 183. Improvements include adding a center-turn lane and medians, extending the right-turn lane to US 183 and creating a new lane configuration at Olson Drive.

Timeline: summer 2020-late 2021

Cost: $7.26 million

Funding source: 2016 Mobility Bond

6. Corridor construction

On Dec. 12, the city broke ground on •the start of about $66.8 million worth of improvements on North Lamar Boulevard between US 183 and Howard Lane that will include new traffic signals and bike facilities, improved pedestrian facilities and rehabbed pavement.

Timeline: 2019-24

Cost: $66.8 million

Funding sources: 2012 and 2016 bonds, city’s Quarter Cent Fund

7. RM 620 bypass road

TxDOT and the city of Austin celebrated the groundbreaking Dec. 11 on the RM 620 bypass project that will add a new road about 1 mile north of Steiner Ranch Road to RM 2222 to relieve congestion at the intersection of RM 620 and RM 2222.

Timeline: December 2019-mid 2021

Cost: $15.8 million

Funding sources: Austin’s 2016 Mobility Bond, TxDOT

8. Expanding Spicewood Springs Road
The city of Austin project to expand Spicewood Springs Road between Loop 360 and the area west of Mesa Drive will remain in the design phase through 2021. Plans include expanding the road to four lanes with a median and turning bays.

Timeline: 2022-24

Cost: $17 million

Funding source: 2016 mobility bond

9. RM 620 expansion

The Texas Department of Transportation is refining options to improve safety and traffic flow on RM 620 between the Mansfield Dam and US 183 and will wrap up those efforts in early 2020. One such option would be to expand the roadway to up to 10 lanes, with some lanes being elevated. The agency will host an open house in early 2020 for residents to discuss the challenges of traveling on RM 620 as well as options to address congestion.

Timeline: construction TBD

Cost: TBD

Funding source: TBD
By Amy Denney
Amy has worked for Community Impact Newspaper since September 2010, serving as reporter and then senior editor for the Northwest Austin edition and covering transportation. She is now managing editor for the nine publications in the Central Texas area.


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