skip to main content

Road Services Division Capital Improvement Program (CIP)

February 1, 2021 - We are in the process of reworking this website. The project information contained here may not be comprehensive or up-to-date. Thank you for your patience, we should have a new site available soon. More project info.

SE 176th Street at SE 171st Way Roundabout

Project No.:  1130261
Project limits:  Intersection of SE 176th Street and SE 171st Way
Project type:  Safety
Thomas Bros. Map No.:  656H7

Project description

This project designs and constructs a mini-roundabout at the intersection of SE 176th Street and SE 171st Way, modifies sidewalks and reconstructs ramps to be compliant with the Americans with Disabilities Act.

Why is King County doing this project?

This project will improve the safety of vehicles and other roadway users in the Fairwood community. SE 176th Street connects multi-family residential developments with a busy commercial area. The intersection was identified as a High Collision Location in King County’s reports in 2013 and 2016. The geometry of this intersection is complex and may be confusing for users. In addition, SE 171st Way intersects with SE 176th Street at a skewed angle. Traffic on this segment of SE 176th Street exceeds the posted speed limit, according to a recent speed study. Mini-roundabouts have been effective at reducing collision rates at intersections and they are also effective at reducing conflicts resulting from a skewed intersection such as this.

Project management phase:  Construction 95%

Status as of July 6, 2020

Project substantially complete December 15, 2019. Work to complete sealant in central island will take place in Spring/Summer 2020 when weather conditions meet requirements (48 hours) and COVID-19 "Stay Home, Stay Safe" orders expire.


See also

King County non-emergency phone numbers
Radar Readerboard Program
Signs, signals and crosswalks
Title VI information
Traffic safety in your neighborhood

Adopted Capital Improvement Program & program overview

The Road Services Division Capital Improvement Program (CIP) contains all design and construction and studies for improvements on roads, bridges or transportation facilities in the unincorporated areas of King County.

Vicinity map

Vacinity map