Enforcement · 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.
This web site allows courts, attorneys, and the general public to search for testing and certification information for all speed measuring devices used by the WSP.
To conduct a search, be sure to have the identification number (tag number) of the speed measuring device and click the following link:
SMD Expert Contact Information
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:
All subpoenas are to be sent to the following address:
For public disclosure requests, please see our Public Disclosure web page.
Please note that some of the documents provided on this page are available in Adobe® PDF format only and will require the Adobe® Reader in order to view or print them from your Web browser.Back to Top
SMD Quick Links