USDOT Number Requirements in Illinois — Decal Size, Display & Penalties
Operating a commercial vehicle out of Illinois? You are subject to FMCSA federal door-marking rules (49 CFR 390.21) plus a small set of Illinois-specific requirements for your USDOT decal. This page walks you through legal sizing, font, placement, and the most common reasons fleets get flagged at roadside inspections by the Illinois State Police (Commercial […]








