Exceptions to mandatory insurance
You don't need to provide mandatory insurance when you operate a vehicle registered as a:
Motorcycle. (RCW 46.04.330)
Motor-driven cycle. ( RCW 46.04.332)
Moped. (RCW 46.04.304)
Antique vehicle. (RCW 46.16.305(1))
Collector vehicle more than 30 years old. (RCW 46.16.305(1))
State or publicly-owned vehicle. (RCW 46.16.020)
Common or contract carrier with the Washington Utilities and Transportation Commission.