In July 2019, the Arizona Department of Public Safety, California Highway Patrol, Idaho State Police, Nevada Highway Patrol, Oregon State Police, and Washington State Patrol collaboratively developed the Western States Traffic Safety Coalition (the Coalition).

With the evolving social issues toward drugs, particularly marijuana, and limited resources, the six state police and highway patrol agencies saw an opportunity to partner with their neighboring states to place even more of an emphasis on developing meaningful enforcement and public education about the dangers of drug-impaired driving.