Vehicles operating under a Special Motor Vehicle Permit are restricted from the following areas: 

• 560-002: Special Motor Vehicle Permit Regulations and Conditions (.pdf, 24kb)

Exemptions are:

1. Vehicles with over-width dimensions only, not exceeding the width limits of the table;
2. Overweight vehicles only, or with the aforementioned over-width features, that can maintain the speed of surrounding traffic; and
3. Vehicles with specific permtis as defined in WAC 468-38-075.