All oversize loads entering the City of O'Fallon, located in St. Clair County, must conform to the requirements set by the Illinois Department of Transportation (IDOT) and local ordinances.

In general, any vehicle exceeding 8 feet 6 inches in width, 13 feet 6 inches in height, or exceeding 80,000 pounds (Weight Class V and above) should obtain an oversize load permit from the O'Fallon Public Works Department, in conjunction with IDOT regulations.

Particular attention should be paid to bridge clearances on heavily trafficked routes like Highway 50 and Interstate 64 within O'Fallon. Detailed route surveys are strongly recommended to avoid potential clearance issues, especially when transporting loads exceeding 14 feet in height.

Escort vehicles are generally required in O'Fallon when the load exceeds 12 feet in width, 14 feet 6 inches in height, or 90 feet in length. Specific requirements depend on the route and time of day.

Local police escort requirements are determined on a case-by-case basis by the O'Fallon Police Department. Fees vary depending on the duration and complexity of the escort, typically around $75 per hour per officer, with a minimum of 4 hours. Scheduling requires at least 72 hours advance notice and is subject to officer availability. Contact the O'Fallon Police Department Traffic Division for scheduling and fee confirmation.

To apply for an oversize load permit in O'Fallon, you must first obtain the necessary permits from the Illinois Department of Transportation (IDOT). Once you have the IDOT permit, you can then apply for a local permit through the O'Fallon Public Works Department. You can contact them at (618) 624-4500 or visit the O'Fallon City Hall at 255 South Lincoln Avenue to obtain the necessary application forms.

Documentation requirements for the O'Fallon permit include a copy of the IDOT permit, a detailed route map indicating the proposed path through O'Fallon, vehicle dimensions and weight information, and proof of insurance. If the load is divisible, a justification for why it cannot be broken down into smaller components is required.

Time-of-day restrictions are in effect in O'Fallon during peak traffic hours, typically from 7:00 AM to 9:00 AM and 4:00 PM to 6:00 PM on weekdays. Movement during these times may be restricted or require a police escort.

Seasonal restrictions may be imposed during periods of inclement weather, such as heavy snow or ice. The O'Fallon Public Works Department will issue advisories regarding these restrictions.

Certain residential neighborhoods and narrow streets are restricted for oversize loads. The route specified in the permit must be strictly adhered to. Avoidance of Milburn School Road and Seven Hills Road is strongly advised due to weight restrictions and narrow roadways.

The base permit fee for oversize loads in O'Fallon is $50.00. Additional charges may apply depending on the size and weight of the load, the length of the route through the city, and the need for police escorts.

Fees may vary based on the complexity of the route, any required street closures, and the duration of the transport. Loads requiring extended time to traverse the city may incur additional hourly fees.