WSDOT Projects

We will widen SR 520 in Redmond.

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Project Facts

• Up to 45,000 vehicles travel SR 202 each weekday.
• Widening SR 520 will reduce peak morning commute times by 60 percent and reduce peak evening commute times by 75 percent.
• The city of Redmond is currently improving the intersection of SR 520 and NE Union Hill Road. This includes a right turn lane from SR 520 to NE Union Hill Road.

We will widen State Route 520 in Redmond from two to four lanes in each direction.  We already completed the flyover ramp from westbound SR 202 to westbound 520.

Why is WSDOT widening both directions of State Route 520 in Redmond?
This project will reduce travel times, improve access and enhance safety for vehicles traveling on State Route 520 between the West Lake Sammamish Parkway interchange and State Route 202.

WSDOT has accelerated the project schedule by building the project in stages to deliver immediate benefits to drivers.

Stage 1
Crews completed the flyover ramp connecting westbound 202 to westbound SR 520 in February 2008.

Stage 2
Crews will widen SR 520 from two to four lanes by adding a merge lane and a carpool lane in both directions of SR 520.

The End Result
This is the final phase of a three-phase project started in the 1990s. The project includes a new ramp that connects westbound SR 202 to westbound SR 520, and additional HOV and merge lanes on SR 520 between West Lake Sammamish Parkway and SR 202.  These improvements will reduce congestion and enhance safety in the east Redmond and Sammamish areas.

This project will also tie into the city of Redmond's improvements at Union Hill Road, a recently completed widening on SR 202 from SR 520 to Sahalee Way and the SR 520 Bridge Replacement and HOV project (Trans-Lake).

Project Benefits
Congestion relief and improved safety. This project will dramatically reduce travel times, especially during peak commute hours, and eliminate points of heavy congestion. It will also reduce collisions in the area.

Stage 1
Instead of waiting in long queues at the on-ramp signal, a new flyover ramp now carries drivers directly from SR 202 onto westbound SR 520. The flyover ramp will eliminate the chokepoint on SR 202 and reduce the number of collisions caused by vehicles running red lights at the NE 76th Street signal. 


Stage 2
Widening SR 520 will reduce peak morning commute times by 60 percent and reduce peak evening commute times by 75 percent. 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.

Environment. There are currently no stormwater treatment facilities in the project area. This project will construct facilities to treat stormwater runoff from the roadway, which will benefit salmon and other fish in nearby streams and rivers.

What is the project timeline?

• May 2007: Flyover construction (stage 1) began
• February 2008: Flyover construction (stage 1) completed
• October 2008: Stage 2 will be advertised to contractors 
• Early 2009: Stage 2 construction begins
• Late 2011: Expected completion

Public Involvement
Your thoughts and opinions are important to us. Contact Project Engineer Hung Huynh with questions and comments about this project at (206) 440-4311.

Environmental Protection
There are currently no stormwater facilities in the project area. This project will construct facilities to treat stormwater run off from the roadway, which will benefit salmon and other species of fish in nearby streams and rivers.
Please visit the WSDOT Environmental Services Web site for more information.

Increasing safety is one of our priorities
By adding carpool and add/drop lanes as well as a flyover ramp, WSDOT reduces congestion and increases safety for drivers.

Will this project impact tribal resources?
Section 106 consultation was initiated with the Suquamish, Muckleshoot, Snoqualmie, Yakama and Duwamish Tribes.  Follow up calls were made to each tribe to invite them to comment on the Cultural Resource Survey produced as part of the project.

Financial Information

This project is funded through the following fund sources.

• 2003 Gas Tax (Nickel Funding) - $105 million 
• Total Funding From All Sources - $105 million

How can I get more information?
Contact:
Hien Trinh
WSDOT Project Engineer - Construction
14711 NE 29th Pl. #224
Bellevue, WA 98007
Phone: (425) 956-2100
E-mail: TrinhH@wsdot.wa.gov

Hung Huynh
WSDOT Project Engineer - Design
15700 Dayton Avenue North
PO Box 330310
Seattle, WA 98133
Phone: (206) 440-4311
E-mail: HuynhH@wsdot.wa.gov

Mike Murphy
WSDOT Communications
15700 Dayton Avenue North
PO Box 330310
Seattle, WA 98133
Phone: (206) 440-4699
E-mail: MurphyM@wsdot.wa.gov

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