Do you need a pilot car in Illinois?

In Illinois, a police / law-enforcement escort is required over 200'0" length; a police / law-enforcement escort is required over 18'0" width; a police / law-enforcement escort is required over 18'0" height; a lead (front) pilot car is required over 145'0" length; a chase (rear) pilot car is required over 110'0" length; a lead (front) pilot car is required over 14'6" width; a chase (rear) pilot car is required over 14'6" width; a height-pole escort is required over 14'6" height. Always confirm with the Illinois permit office, as thresholds change and permits can impose case-by-case conditions.

Illinois Pilot Car Requirements

When does an oversize or overweight load need a pilot car or escort in Illinois? Here are the width, height, length and weight thresholds that trigger an escort, a height pole, or a police escort.

✓ Cross-checked against the state sourceIllinois permit source →

Escort & pilot car requirements

Police / law-enforcement escortover 200'0" length
State police escort required for overall lengths over 200' (92 Ill. Adm. Code 554.204).
Police / law-enforcement escortover 18'0" width
State police escort required for widths over 18' on all highways (92 Ill. Adm. Code 554.204).
Police / law-enforcement escortover 18'0" height
State police escort required for heights over 18' (92 Ill. Adm. Code 554.204).
Lead (front) pilot carover 145'0" length
Front pilot car required for combinations over 145' overall length on 2-lane highways.
Chase (rear) pilot carover 110'0" length
Rear pilot car required for combinations over 110' overall length.
Lead (front) pilot carover 14'6" width
Front pilot car required on 2-lane undivided highways when width exceeds 14'6" (554.208).
Chase (rear) pilot carover 14'6" width
Rear pilot car required on divided highways when width exceeds 14'6" (554.208).
Height-pole escortover 14'6" height
Height-pole vehicle required when load exceeds 14'6" in height (92 Ill. Adm. Code 554.208).

Travel restrictions

Daylight-only travelover 14'6" width
Travel restricted to Mon–Fri sunrise–sunset and Sat sunrise–noon for widths over 14'6".
Weekend / holiday restrictionover 14'6" width
No travel on New Year's Day, Memorial Day, July 4, Labor Day, Thanksgiving, or Christmas.

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Informational only. These thresholds are compiled from published Illinois DOT references and are not legal or operational advice. Permit conditions can differ from the general tables, and rules change — always verify with the Illinois permit office before you move a load.

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