SR 510 - Meridian Rd SE - Roundabout

Project news

  • During spring 2019, WSDOT will build a modern roundabout at the intersections of State Route 510 and Meridian Road Southeast. Learn more at the linked YouTube video.
  • Traffic impacts will be minimized during construction as the roundabout will be built just east of the existing roadway. 
  • See how roundabouts work.

Needs & Benefits

Safety is WSDOT’s number one priority. This intersection has been identified as a location with a history of collisions. A roundabout at this location offers the greatest safety benefit by reducing the potential for severe collisions, while improving connectivity along the corridor. Roundabouts move traffic through an intersection more efficiently and with less congestion. Traffic approaching a roundabout yield rather than coming to a complete stop and waiting for a traffic signal. Other benefits include improved access onto Meridian Road Northeast and increased sight distance. 

How to use a roundabout:

  • Slow down before entering the roundabout.
  • Yield to traffic already in the roundabout. Wait for a gap and then enter the roundabout.
  • Use turn signals when exiting the roundabout.


  • Construction: Spring 2019
  • Complete: Fall 2019



Financial Data for PIN 351033A
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $3,394
CWA $0
Total $3,394


Doug Adamson 
WSDOT Communications

Brian Whitehouse
WSDOT Project Engineer

Crews will build a new roundabout at the intersection of SR 510 and Meridian Road Southeast