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Publications

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Publication

Inventory of Evidence-Based, Research-Based, and Promising Policies for Reducing Impaired Driving

Open Publication PDF

Travis Taniguchi, Leah Hardenbergh, Heather Grob - June 2026

The 2025 Washington State Legislature directed WSIPP to develop an inventory of strategies designed to reduce alcohol impaired driving. For this inventory, we reviewed and synthesized evidence on the following strategies: reducing per se blood alcohol content to 0.05 g/dl, sobriety checkpoints, increased law enforcement, financial penalties, and administrative license suspensions.

The accompanying report describes WSIPP’s process for identifying, evaluating, and classifying research evidence, outcomes commonly associated with impaired driving research, and results of meta-analyses and benefit-cost findings. Available evidence suggested that both 0.05 per se BAC and sobriety checkpoints met the criteria to be classified as evidence-based practices. Enforcement for impaired driving and financial penalties for impaired driving had limited evidence of effectiveness, resulting in a null designation. Administrative license suspension was classified as promising because, although research was limited, evidence suggested reductions in fatal crashes.

Download:   Report    Inventory    Executive Summary    Inventory Flowchart  
Related:
Legislation