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SR 510 - SE of Reservation Rd. - Intersection Improvements

Project location for two new roundabouts on SR 510
View a larger image of the project vicinity map.

One of two new roundabouts on SR 510 
One of two new roundabouts on State Route 510 at the intersections of Reservation Road and Yelm Highway.


October 2014

  • WSDOT hosted a ribbon cutting ceremony to celebrate the extraordinary cooperation by multiple jurisdictions on this project. The two new roundabouts are now complete. View photos of the ribbon cutting ceremony here. You can also view photos of the groundbreaking ceremony here.

This project on SR 510 will reduce the potential for collisions and improve traffic flow for Thurston County motorists after building roundabouts at the intersections of SR 510 with Reservation Road and Yelm Highway.

View the proposed new roundabouts (pdf 634kb).

Why is WSDOT building roundabouts on SR 510 at the intersections with Reservation Road and Yelm Highway?
These intersections experienced a high rate of collisions and congestion during peak hours. Reconfiguring these intersections as roundabouts has a high potential for reducing the frequency and severity of collisions and improving mobility.

WSDOT, Thurston County and the Nisqually Indian Tribe completed an Intersection Alternatives Study in 2011. This study found that constructing roundabouts at these two intersections would provide the most effective solution.

The roundabout at these two intersections are meant to reduce the frequency and severity of collisions as well as improve traffic flow in the area. For more information on the benefits of roundabouts ...

The End Result
In this project, crews built roundabouts at the Yelm Highway and Reservation Road intersections. SR 510 roundabouts are connected with a four-lane highway.

Project Benefits
Our goal is to make safety improvements that will help reduce the potential for injury and fatal collisions, help improve safety, and reduce congestion.

What is the project timeline?
Construction begain in the summer of 2013.  Work was complete in summer 2014.

Financial Information

Financial Data for PIN 351032A
Funding Source Amount ($ in thousands)
2003 Gas Tax (Nickel Funding) $0
2005 Gas Tax (TPA) $0
Pre-Existing Funds (PEF) $5,115
Total $5,115

Project signage will reflect the cost of construction engineering, project bid award and sales tax.


How can I get more information?
Steve Fuchs
Project Engineer

Claudia Bingham Baker
Communications Manager

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