Budget Information

SR 20 - Sharpes Corner Vicinity - Interchange

Project news

  • Around-the-clock lane reductions will start on Monday, April 2.
  • WSDOT awarded this project to Tapani, Inc.
  • WSDOT engineers will be available to talk about this project from 5:30 to 7:30 p.m. on Tuesday, March 20 at Sedro-Woolley High School.​
  • Sign up for email updates about this project and other state roadwork in Island and Skagit counties.

The Sharpes Corner intersection experiences significant congestion, especially during the busy summer tourist season. Lengthy backups can extend out into 55 mph traffic, which increases the risk of high-speed, rear-end collisions.

WSDOT designed improvements for the SR 20 Sharpes Corner intersection near Anacortes before the project was shut down in 2009 when the funding was cut. Funding for design and construction was approved by the Legislature in July 2015 as part of the Connecting Washington Revenue Package.

Based on the previous analysis and new design work and community involvement, it was determined that a roundabout is the practical solution at this busy intersection to improve safety and relieve congestion. The project will also include a roundabout at Miller-Gibralter Road intersection, along with some improvements for pedestrian and bicycle travel along the highway.

Why is WSDOT improving the Sharpes Corner intersection?
SR 20 is the only land access to the city of Oak Harbor, the Whidbey Island Naval Air Station and the rest of Whidbey Island. SR 20 Spur is the primary access to Anacortes and ferry service to the San Juan Islands and Sidney, B.C. As a result, the intersection of these two roadways has significant regional importance to those who live on and visit the islands.

On average, more than 30,000 vehicles pass through the Sharpes Corner intersection every day, creating heavy traffic congestion. Backups can be severe and increase the chance of collisions. Traffic turning west toward Whidbey Island often backs up beyond the turn lane, leaving vehicles stopped on the highway, increasing the chance of rear-end collisions.

We’ve also heard from many of you that bike/pedestrian improvements are important, and we will make upgrades in for non-motorized traffic as well.

The End Result
Improving this intersection and the surrounding area will improve traffic flow and will help reduce the frequency and severity of collisions.

Project Benefits

  • Safety: Improvements to these intersections will increase traffic flow and decreases the risk of rear-end collisions, making the roadway safer for drivers. Bicycle and pedestrian improvements will increase safety and mobility in the area. 
  • Congestion relief: Drivers will see significant increases in roadway capacity and traffic flow. This means shorter drive times and less time sitting in traffic.
  • Non-motorized improvements: A multi-use path and additional crosswalks will be added in the area at designated facilities at Marches Point Road for pedestrians and cyclists. Additional signs will be added to increase safety.
  • Environment: We will make improvements to stormwater culverts and detention ponds where necessary to meet current WSDOT environmental standards.

What is the project timeline?
Fall 2017: Advertise project for competitive bidding.
Spring 2018: Estimated construction start date.
Fall 2018: Scheduled construction completion date.

Financial Information

Financial Data for PIN 102029K
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $0
CWA $13,400
Total $13,400

How can I get more information?

Andrea E. Petrich 
WSDOT communications

Gabe Ng 
Project Engineer 

A view of the project area
View larger map


SR 20 Sharpes Corner


Starting on April 2, 2018 contractor crews will start construction on intersection improvement work near the SR 20/SR 20 Spur (Sharpes Corner) intersection in Anacortes.