St. Louis County, MO Parking Rules: Commercial & Oversized Vehicles (2026)
Key Facts
- Governing code
- SLCRO § 1207.075
- Weight threshold
- Over 12,000 lbs. gross vehicle weight
- Restricted hours
- Midnight to 11:00 a.m.
- Tractor-trailers
- Banned on residential roadways at any time
- Exceptions
- Emergencies, active loading/unloading, government work
- Last amended
- Ordinance No. 29231, January 15, 2025
- Violation class
- Misdemeanor under § 1201.030
Summary
St. Louis County bars commercial motor vehicles over 12,000 pounds from parking on residential-district roadways between midnight and 11 a.m., and bans tractor-trailer rigs from residential streets at any hour except while loading or unloading. Section 1207.075, amended as recently as January 2025, defines 'commercial motor vehicle' to include boom trucks and commercial tow trucks.
1207.075 - Parking of Commercial Motor Vehicles in Residential Districts. —1. No commercial motor vehicle having a gross weight in excess of twelve thousand (12,000) pounds shall be parked on any roadway or highway in a residential district between the hours of 12:00 midnight and 11:00 a.m. of any day, except in an emergency. For purposes of this section, "commercial motor vehicle" shall include boom trucks and commercial tow trucks.
2.No tractor or tractor-trailer or tractor-trailer truck unit shall be parked on any roadway in a residential district at any time, except while loading or unloading, with the exception of governmental vehicles during work-in-progress. ... 1201.030 - Violation of Code a Misdemeanor.—It is a misdemeanor for any person to do any act forbidden or fail to perform any act required in this code.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 85 | Traffic: Supplement 80).
Full Breakdown
of any day, except in an emergency, and the section specifically folds boom trucks and commercial tow trucks into that definition. Subsection 2 goes further for tractor-trailers: no tractor or tractor-trailer or tractor-trailer truck unit shall be parked on any roadway in a residential district at any time, with the only carve-outs being active loading or unloading and government vehicles engaged in work in progress. Because the rule is keyed to 'roadway,' the paved travel portion of the road elsewhere defined in Chapter 1207, it targets on-street parking rather than a company truck parked in a business's own lot.
The county amended this section as recently as Ordinance No. 29231 on January 15, 2025, confirming it remains an active enforcement priority in the county's residential subdivisions. 020 extends this ban to unincorporated county roads and to county arterial roads, meaning a heavy truck parked overnight on a county arterial running through an incorporated city can still be cited under this section even where the city's own truck-parking rule differs.
Violations & Fines
A commercial vehicle over 12,000 pounds caught parked on a residential roadway between midnight and 11 a.m., or a tractor-trailer parked on a residential roadway at any hour outside active loading or unloading, is a Traffic Code misdemeanor under Section 1201.030. The St. Louis County Police Department and Missouri State Highway Patrol enforce the ban and can cite and tow the offending vehicle.
Frequently Asked Questions
Can a moving truck park overnight on a residential street in St. Louis County?
Can a tractor-trailer ever park on a residential street?
Does 'commercial motor vehicle' include tow trucks?
Sources & Official References
Other rules in St. Louis County
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