Traffic Calming

The following measures focus on bringing the community together to raise awareness and educate drivers that they are in a neighborhood where there is a strong desire for them to drive responsibly.

Speed Watch Trailer

Speed watch trailer

The speed watch trailer detects and displays the speed of oncoming vehicles.  Placing the speed watch trailer on your street is another reminder to drivers to drive responsibly.  In 2015 the focus will be on streets adjacent or near schools.


Getting a ticket is a strong deterrent to speeding. SDOT works closely with the Seattle Police Department (SPD) on periodic enforcement where speeds are excessive on arterial streets where there is a significant sfety concern.

Yard Signs

Yard sign

Yard signs are intended to inform drivers that they are travelling on a neighborhood street and remind drivers to slow down. Learn how to get free yard signs for your neighborhood.

Parking Management

Street parking

Parking on both sides of the street can be an effective traffic calming tool. On wide open streets, some drivers can feel 'encouraged' to travel at high speeds.  Narrower streets force them to slow down.  On this street, if a driver faces an on-coming vehicle, each driver must find a spot to maneuver so they can pass.

Painted Intersection

Painted intersection

Also called 'intersection repair', consists of a mural painted by community groups on the pavement at the intersection of residential streets.  This measure can help give your community a sense of place, and is a great way to organize your neighborhood around a common goal.  They may also have indirect effects on helping to slow traffic in your neighborhood by making drivers aware that this is a socially organized neighborhood, and helping encourage them to be respectful of the people that live there while driving down your street. Additional information about painted intersections is available in Client Assistance Memo 2506.