Missouri Truck Bans & Hazmat Routes

Where Missouri keeps trucks out

Missouri has no cars-only parkway. On paper, hazmat just follows the Interstates under 49 CFR 397, and the state posts no designated hazmat routes. On the road, the rules go local. St. Louis signs a timed commercial-semi ban on McCausland Ave (City Ordinance 69093, trucks under 26,000 lb exempt), and both St. Louis and Kansas City post truck routes and weight-limited streets. Read the posted sign, not your car GPS.

Key restrictions

• St. Louis bans commercial semis on McCausland Ave during posted hours; trucks under 26,000 lb GVW are exempt (City Ordinance 69093).
• No cars-only parkways statewide; the real limits are local weight-posted streets and bridges in St. Louis and Kansas City.
• Legal size ceiling is 13'6" high and 8'6" wide without a permit (Mo. Rev. Stat. 304.170).
• Hazmat runs the Interstates by default; watch for St. Louis and Kansas City local hazmat routing near downtown.

• Parkway / road ban: No cars-only parkways. St. Louis and Kansas City set their own truck routes and post time-of-day semi bans on some streets, like the McCausland Ave restriction in St. Louis.
• Hazmat: No state-designated hazmat tunnel or bridge bans, and Missouri lists no designated or restricted hazmat routes in the FMCSA National Registry. Placarded loads default to the Interstates under 49 CFR 397. St. Louis and Kansas City Mississippi and Missouri River bridges, including the Poplar Street Bridge (I-55/64/70), carry hazmat, but the cities can post local routing that steers loads away from downtown.
• Through-truck routes: State law leaves truck routing to the cities. St. Louis and Kansas City mark truck routes and post no-thru-truck and weight-limited streets in residential areas. A local delivery may leave the route by the most direct path to the stop; a through truck with no local stop stays on the marked network or the Interstate.
• Fine: St. Louis and Kansas City truck-route and time-restriction violations typically run roughly $50 to $500 as municipal fines, depending on the city and street; overweight or over-dimension citations follow the state schedule and rise with the amount over the limit.

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