Washington Pilot Car Requirements
When does an oversize or overweight load need a pilot car or escort in Washington? Here are the width, height, length and weight thresholds that trigger an escort, a height pole, or a police escort.
Escort & pilot car requirements
- Lead (front) pilot carover 20'0" width
Front+rear pilots required on 4+-lane divided highways for widths over 20'. Lead+chase both required on all routes at this width (WAC 468-38-075).
- Height-pole escortover 14'6" height
Front pilot with height-clearance pole required for loads over 14'6" on all highway types. On 4+-lane roads, chase also required when load is over 12' wide (WAC 468-38-075).
- Chase (rear) pilot carover 125'0" length
Rear pilot required on 4+-lane divided highways for overall lengths over 125'. Superload classification applies at this threshold (WAC 468-38-075).
- Lead (front) pilot carover 105'0" length
Rear escort required for lengths over 105' on 2-lane roads. On 4+-lane, rear escort required over 125' (WAC 468-38-075).
- Chase (rear) pilot carover 14'0" width
Rear pilot required on 4+-lane divided highways for widths 14'1"–20'. Single chase position until 20' threshold; lead+chase both required above 20' (WAC 468-38-075).
- Lead (front) pilot carover 11'0" width
Front+rear pilots required on 2-lane undivided highways when width exceeds 11'. Conservative threshold; always confirm route in permit (WAC 468-38-075).
- Lead (front) pilot carover 20'0" front overhang front overhang
Front pilot required when front overhang exceeds 20' on 2-lane highways (WAC 468-38-075).
- Chase (rear) pilot carover 20'0" rear overhang rear overhang
Rear pilot required when rear overhang exceeds 20' on 2-lane highways or when rear overhang exceeds 1/3 of trailer/load length (WAC 468-38-075).
Travel restrictions
- Daylight-only travelover 12'0" width
Loads outside the 12'W / 14'6"H / 105'L nighttime envelope require permit notation 'Nighttime movement approved'. Commuter curfew applies in Seattle-Everett, Tacoma, Olympia, Vancouver corridors (WAC 468-38-075).
- Weekend / holiday restrictionover 11'0" width
No movement on New Year's, Memorial Day, Independence Day, Labor Day, Thanksgiving + day after, Christmas. Restrictions begin noon of preceding day for all oversize loads (WAC 468-38-095).
Driver & inspection requirements
- Certified escort driver requiredover 11'0" width
Washington requires Evergreen Safety Council certification for all escort drivers; 3-year renewal. Reciprocal with AZ, CO, GA, MN, NC, OK, UT, VA (WAC 468-38-100).
Need a pilot car in Washington? See what a Washington pilot car costs →
Informational only. These thresholds are compiled from published Washington DOT references and are not legal or operational advice. Permit conditions can differ from the general tables, and rules change — always verify with the Washington permit office before you move a load.
Need a pilot car in Washington?
AmberLight is matching verified escort operators with oversize carriers across Washington. Join the waitlist and we'll reach out as we open in your area.
Join the waitlist