All oversize loads entering the City of Chesterfield, located in St. Louis County, must conform to the requirements set by the Missouri Department of Transportation (MoDOT).

In general, any vehicle over 12 feet in width, 14 feet in height, and within the Class 1 or larger should obtain an oversize load permit from the Chesterfield Public Works Department, as loads exceeding these dimensions require coordination with the City.

Chesterfield adheres to MoDOT's regulations for heavy haul, including route planning to minimize disruptions to local businesses and residents.

In Chesterfield, escort vehicles are mandatory for oversize loads wider than 16 feet or taller than 18 feet, as per MoDOT's escort regulations. Escort vehicles are also necessary when the load extends beyond the travel lane.

For escort services, arrangements must be coordinated through a certified escort service. The Police Department may also be notified in case a police escort is deemed required, with scheduling and fees managed through the Chesterfield Police Department's administrative division.

To obtain a permit in Chesterfield, applicants can visit the City's Public Works website or contact the MoDOT Oversize/Overweight Permit Office directly. Detailed route information and load specifics are necessary for processing.

Documentation must include detailed load dimensions, proposed travel dates and routes, and any additional information relevant to the oversize load's passage through the city.

Oversize vehicles are generally not permitted on Chesterfield roadways between 6:00 AM and 9:00 AM and 3:00 PM and 7:00 PM on major routes during weekdays, to minimize traffic disruptions.

Additionally, heavy haul transport may be halted or restricted during severe weather events like heavy rain or ice, following directives from local law enforcement or the Public Works Department.

For Chesterfield, the base permit fee is $75. Additional fees may be incurred for complex routes that involve modifications to traffic control or require extensive coordination.

The total fee is determined based on the route's complexity, load dimensions, and whether additional escorts are needed.