User:PK-WIKI/Roundabouts in Washington (state)

The state of Washington contains many roundabouts at intersections in the state's road network. Modern roundabouts have been shown to improve traffic flow and increase safety versus other options such as traffic signals and stop signs.

The first two roundabouts in the state opened in 1997, near Bellevue and Tacoma. By 2002, 25 roundabouts existed in the state. According to the Washington State Department of Transportation, by 2017 the state ranked third in the nation in number of roundabouts built (behind Wisconsin and Georgia) and the state had 430 roundabouts in 2019.