WTSC - Traffic Safety Statewide Survey - 2023 - Methodological Plan - v1 Wednesday October 18, 2023 8:59 AM Washington Traffic Safety Commission Washington Impaired Driving Advisory Council Source https://wtsc.wa.gov/...ntent/uploads/2023/10/2023-Survey-Methodological-Plan.pdf Replications Cannabis Observer Related WTSC - Traffic Safety Statewide Survey - 2023