Installation of new speed cushions on Alki and Harbor Ave SW  began as promised on July 29.. The work is still being scheduled and may last up to a week. Crews will return about a month later to paint permanent markings cnce the asphalt has hardened.

People who park near these locations should be on the lookout for temporary No Parking signs during construction (both when the speed humps are being built starting in late July, and when crews return about a month later).

Over the past few years, SDOT has also added speed humps in several other locations along Aki Ave SW and Harbor Are SW, and built a raised center divider to prevent people from illegally driving the wrong direction to pass other cars.

56th Ave SW is also due for some updates.

NOTE:  To avoid confusion, speed cushions, humps, and bumps are often used interchangeably.  However, speed cushions are done with cut-outs on non-arterial streets which are generally more narrow so to allow for fire truck access.  The speed 'humps' are more shallow than speed 'bumps' to allow for fire truck access but steep enough to slow vehicles down on the arterial streets.  

The speed cushion implementation is essentially a Phase 1 of potential improvements. SDOT will also be looking at narrowing he roadway outside the Duwamish Head area, where the lane width is already relatively narrow, and this work will be done likely in September.”