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SR 542 - SR 9 East Junction - Intersection Improvements


A map of the SR 9 SR 542 intersection.
The intersection of SR 542/Mount Baker Highway and SR 9 in Whatcom County.

A photo from SR 9 looking at the intersection with SR 542.
A northern look at the intersection of SR 542/Mount Baker Highway and SR 9.

Status

November 2017

  • A roundabout design has been chosen for this intersection improvement project. 
  • This project is scheduled to be advertised for contractor bidding starting Monday, Nov. 6, 2017. Contractors who are interested in this project should make sure they are prequalified to bid as a prime WSDOT contractor.
  • Sign up to get weekly emails about this, and other, Whatcom County construction projects.

Overview
WSDOT will build a roundabout at the intersection of SR 542/Mount Baker Highway and the eastern leg of SR 9 to improve safety and reduce severe crashes.

Why is WSDOT building a roundabout?

Following community feedback and speed and crash analysis, WSDOT engineers determined a roundabout will be the most effective way to improve safety at this intersection. This roundabout will keep traffic moving and reduce severe crashes. The roundabout will lower the speed of travelers on SR 542 allowing SR 9 drivers to safely enter the intersection and turn left on SR 542.

What are the benefits of roundabouts?

  • They reduce delay and improve traffic flow. 
  • They are less expensive than a traffic signal.
  • They are able to be built in current footprints and often take up less space than other intersection improvement options.

What should travelers expect during construction?
During construction WSDOT contractor crews will have flaggers alternating travelers through this intersection around-the-clock. Contractor crews could work days and nights on this project to get it finished as quickly as possible. Travelers should plan for up to 30 minutes of delays if they need to travel through this work zone.

The End Result
This project will increase safety for Mount Baker Highway travelers by reducing:

  • The speed of east and west bound drivers to improve turning safety from SR 9 to SR 542.
  • Severe collisions.
  • The number of injury crashes, supporting Washington's strategic highway Target Zero plan.

Project Benefits
This intersection improvement project will help move Mount Baker Highway neighbors and visitors safely and efficiently through this stretch of highway.

What is the project timeline?
Fall 2017 - Advertise project for competitive bidding
Winter 2017/2018 - Award project to a contractor
Late Spring/early summer 2018 - Begin roundabout construction
Summer/fall 2018 - Complete construction

Financial Information

Financial Data for PIN 154214F
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $1,441
CWA $0
Total $1,441

The estimated cost of this project is $1.5 million.

How can I get more information?
Contact:
Andrea E. Petrich
communications
360-757-5963
PetricA@wsdot.wa.gov

Gabe Ng
project engineer
360-788-7403
NgGabe@wsdot.wa.gov

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