Speed Measuring Devices

The Washington State Patrol uses electronic and laser speed measuring devices (SMD) in its speed enforcement efforts.

The courts of the state of Washington require that speed measuring devices undergo a testing and certification program for accuracy in order for evidence from the devices to be admissible in court proceedings. The WSP maintains a testing and certification program that requires each speed measuring device used by the WSP to be tested and certified for accuracy at least once every two years.

You can search for testing and certification information for all speed measuring devices used by the WSP below.


Anthony Hillock
Electronic Services Division
Washington State Patrol
2822 Euclid Avenue
Wenatchee, WA 98801-5916
Phone: (509) 682-8185
Cell: (509) 264-8798
Fax: (509) 682-8170

Steve Rosario
Electronic Services Division
Washington State Patrol
2502 – 112th Street
Tacoma, WA 98445-5104
Phone: (360) 704-5485
Cell: (360) 701-0298

The Washington State Patrol has two experts (above) assigned as custodians of the records and are authorized to testify in court representing the WSP on all SMD related matters. Subpoenas must have both experts names on the request as part of the required information listed below:

• Experts names
• Defendant’s name
• Date of the violation
• Unit used – SMD number (Radar or Lidar)
• Notice of Infraction number (ticket number)

All subpoenas are to be sent to the following address:
Anthony Hillock and Steve Rosario
WSP – Electronic Services Division
106 11th Ave SW, Suite 3200
Olympia, WA 98504-2645