RM 620 expansion and 3 other transportation project updates in Northwest Austin

(Courtesy X Space Group)
(Courtesy X Space Group)

(Courtesy X Space Group)

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, which it plans to wrap up 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: TBD (construction)

Cost: TBD

Funding source: TBD

Improving US 183

TxDOT announced in September plans to improve US 183 in North Austin. These proposals include adding auxiliary, or merge, lanes between Metric Boulevard and Cameron Road. Other improvements could include adding a main lane on the southbound side and closing the entrance ramp near Georgian Drive. TxDOT is awaiting environmental clearance for the project and expects to award a construction contract in the spring.

Timeline: spring 2020-21

Cost: $3 million (estimated)

Funding source: TxDOT

Parmer Lane diverging diamond

Construction began in August at Parmer Lane and I-35 to add a diverging diamond interchange. Through this interchange, vehicles will cross over to the opposite side of the road to facilitate more efficient turns. Crews are now constructing the southbound I-35 bypass lane at Parmer and reconstructing the northbound bypass lane. Work to upgrade utilities and Intelligent Transportation Systems is ongoing.

Timeline: July 2019-mid-2021

Cost: $32.5 million

Funding source: TxDOT

I-35 work

The I-35 project includes the addition of three flyovers connecting I-35 and US 183 as well as the reconstruction of the existing northbound I-35 to northbound US 183 flyover. Crews recently finished pouring concrete for the bridge deck on the new north-to-south turnaround at St. Johns Avenue. In early November, workers set 12 concrete beams for the southbound I-35 to southbound US 183 flyover.

Timeline: January 2018-mid-2021

Cost: $124.2 million

Funding source: TxDOT


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