SEATTLE -- Washington state troopers are keeping a close eye on their colleagues in Colorado who continue testing new technology aimed at keeping drivers high on marijuana off the road.

Law enforcement officers in Washington currently don't have a device to detect pot or other drugs. They depend on their skills and the standard field sobriety test.

Across the country and around the world, a wide-range of machines are being developed and tested similar to Washington State University’s marijuana breathalyzer.

"Whether it's measuring THC on the breath or in the saliva, some are looking at transdermal applications, so just measuring off of sweat from the body,” said Lt. Rob Sharpe with the Washington State Patrol.

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Michael Konopasek ~ KING 5 News ~