We have widened State Route 520 in Redmond from two to four lanes in each direction. The new lanes include one new mile of HOV lanes between West Lake Sammamish Parkway and SR 202, a chronic chokepoint. We have also added a new outside lane between WLSP and SR 202.
When we opeend the lanes, drivers told us they wanted two lanes to exit to SR 202/Redmond Way. In October, we are planning to make some changes to the SR 202 exit, as requested by drivers.
This is the latest phase in a multiphase project to improve traffic flow and safety in the SR 520 corridor in Redmond. In 2008, we opened the flyover ramp from westbound SR 202 to westbound 520.
Adding merge lanes will help reduce sideswipe collisions, and eliminating traffic bottlenecks will help reduce backups that can lead to rear-end collisions.
Widening SR 520 will reduce peak morning and evening commute times. It will also eliminate the existing single lane bottleneck between SR 202 and Avondale Road. Extended carpool lanes will reduce travel times for transit, carpools and vanpools by providing seamless access to the east end of the SR 520 floating bridge.
| Protects Environment
New stormwater treatment facilitiies will treat runoff from the roadway, which will benefit salmon and other fish in nearby streams and rivers.
Partnerships & Cooperation
WSDOT teamed with the city of Redmond to minimize impact to drivers and nearby residents throughout construction. This project also ties in to improvements made by the city to the Avondale/Union Hill intersection.
- 2003 Gas Tax (Nickel Funding): $81,256,000
- Pre-Existing Funds: $136,000
- Total funding: $81,392,000
WSDOT Project Engineer - Construction
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