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Delivering a first-rate transportation system for Seattle Scott Kubly, Director



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Active Speed Monitors

Tool Snapshot: Active Speed Monitor

  • Permanent device that displays drivers’ speeds.


  • Provides immediate feedback.
  • Does not require officer to be present.


  • Cannot be moved around easily.

Active speed monitors, sometimes referred to as Know Your Speed signs, are permanent devices to keep drivers aware of their speeds and the need to slow down in certain areas (such as near schools). They are typically mounted on a speed limit sign and visually display drivers real-time speeds as they pass. Drivers see how fast they are actually driving compared to the posted speed limit. Some active speed monitors are solar-powered.

Speed Monitor
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