No, radar detectors are prohibited for use in Washington state vehicles, as RCW 46.37.060 explicitly bans their operation on public roads. The Washington State Patrol enforces this statute, which classifies radar detectors as illegal devices under traffic safety regulations. While possession in private vehicles remains technically unregulated, active use during driving constitutes a traffic infraction subject to fines. Local jurisdictions, including Seattle and Spokane, align with state enforcement priorities, though no 2026 policy shifts have altered the statutory prohibition.
Key Regulations for Radar Detectors in Washington
- Statutory Ban: RCW 46.37.060 criminalizes the use of radar detectors on public highways, with violations punishable by fines up to $250 under traffic court discretion.
- Enforcement Scope: The Washington State Patrol (WSP) and municipal police departments actively cite drivers observed using active detection devices, particularly in high-speed corridors like I-5 and I-90.
- Commercial Exemptions: Commercial vehicles (e.g., trucks over 10,000 lbs) face stricter scrutiny under federal regulations (49 CFR § 393.89), where radar detectors are deemed non-compliant with safety equipment standards.
Local ordinances do not supersede state law, and no pending legislation in the 2025–2026 legislative session proposes decriminalization. Out-of-state drivers remain subject to the same restrictions, with potential additional penalties for non-resident traffic violations.