S. 160th St. Speed Cushion Pilot Project


Neighbor complaints and a RADAR study indicate excessive speeding on South 160th Street. Because of the upcoming closure of 42nd Ave. South due to road work, it is likely that South 160th will see additional traffic and ongoing speed issues.

The City of Tukwila will test a pilot program installing speed cushions on South 160th to see if they reduce speeding. The City has been and will continue to monitor speeds on South 160th, during the pilot program and afterwards, to determine the success of speed cushions in our community.

If successful, the City may install speed cushions at additional locations in other residential neighborhoods that are determined to have excessive speeding problems.

What are Speed Cushions?

Speed cushions are either speed humps or speed tables that include wheel cutouts to allow large vehicles to pass unaffected, while reducing passenger car speeds. They can be offset to allow unimpeded passage by emergency vehicles and are typically used on key emergency response routes.

What’s Next?

Public Works staff marked six spots on South 160th Street between 42nd Ave South and 51st Ave. South where the initial speed cushions will be installed.

Installation will begin this spring. It is anticipated the speed cushions will stay in place for up to a year.

Residents are encouraged to offer feedback about the project in writing, by emailing or by sending a letter to David at 6200 Southcenter Boulevard Tukwila, WA 98188.

Questions? Call 206-431-3653.