2021 Shipping laws and regulations for shipping oversize and over-weight loads in the state of Illinois.
Please share your expertise or knowledge of Illinois state shipping regulations with other visitors below.
Legal load limits in Illinois.
Illinois DOT legal load size & weight limitations.
Length: 65’ overall length maximum.
Width: 8’6” on the interstate and other designated highways, 8’ on non-designated highways.
Weight: GVW 80,000, Single 20,000, Tandem 34,000, Tridem 42,000
Height: 13’6” is the maximum allowed height for legal loads.
Overhang: 3’ front in the front and 3’ off of the rear of the trailer.
Routine oversize shipping, trucking and transport permits.
Oversize and overweight trucking permits that are routinely issued by the state of Illinois.
Length: Up to 145’ long. Anything longer refer to the superload section below.
Weight: Single 24,000, tandem: 48,000, tridum: 60,000, Quadem: 60,00 gross, 5 Axles 100,000 lbs., 6 Axles 120,000 lbs., 7 axels: 120,000, 8 axles: 120,000 lbs.
Width: 14’6” (any load over 16′ will require special admin approval before a permit is issued).
Height: 15’ (any load over 16′ tall requires a route survey).
Illinois DOT superload information.
Length: Any load that is longer than 145′ is considered a superload.
Width: Any load that is in excess of 14′ 6″ in width is considered a superload.
Height: Any load that is in excess of 15′ 6″ in height is considered a superload.
Weight: Any load that exceeds 120,000 lbs on any standard axle configuration whether it’s a 6,7 or 8 axle configuration or not is considered a superload.
Overhang: Contact them as this varies depending on the route.
Notes: Spacing between steer and first tandem must be more than 8′ 1″. The spacing before the first axle and the trailer must not exceed 18′ 6″. All axle spacings combined must not be less than 43′ 6″. Superload permit processing times vary. Expect delays. Before requesting a route you are expected to do as much research on your own as possible. They will refer you to GettingAroundIllinois for construction zones and other closures.
Permitted travel times and restrictions in Illinois:
Illinois travel times and restrictions for oversize loads.
Travel is permitted from ½ hour before sunrise to ½ hour after sunset Monday thru Friday and ½ hour before sunrise until 12PM on Saturdays. Loads that are overweight only may travel 24/7 on all days of the week (make certain it is not documented otherwise on your permit before doing so). No travel is permitted on Sundays unless you are below the routine permit standards of no more than 115′ in length, 12′ in width, 13′ 6″ in height (sunrise to sunset rules apply). No movement is permitted on the major holidays: New Years Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. Travel stops at 12PM on the day before any of these holidays. The Illinois oversize load permit office is closed on MLK Day, Lincoln’s birthday, Washington’s birthday, Columbus Day, Election Day, Veterans Day, and on the day after Thanksgiving. However, travel is not restricted on these days. Always refer to your permit for approved travel times.
Required shipment, truck and trailer markings:
Truck, trailer, and shipment required signs, banners, and flags.
A rotating amber light must remain on at all times mounted on top of the cab and be visible from 360 degrees from a minimum of 500′ in direct sunlight. If your overall length is more than 80′ in length you are required to have one amber light over the cab of the truck and one amber light no more than 10′ from the rear of end or trailer/load at the highest point that is practical. Oversize load signs must be a minimum of 7′ in width x 18″ in height, have a yellow background color with black lettering no less than 10″ in height x 1″ thick – we have recently heard 12″ tall x 2″ thick so please clarify and comment below if you know which is correct. Flags are required at all 4 corners of the load and front of the truck and are to be safety red in color and no less than 18″ square. Shipments over 75′ in length, 10′ in width, or 14′ 6″ in height are required to have signs. Signs must be placed on the front and rear extremities of the truck, trailer, or load.
When pilot cars are required:
Length: If over 110′ in length you are required to have a minimum of 1 pilot car and in some places 2 pilot cars (higher traffic density or certain times of year). If over 145′ (150′ in some very rural areas) in length you are required to have 3 pilot cars – yes 3. If over 175′ in length a police escort will be required.
Width: Up to 14’6” requires 1 pilot/escort vehicle. Over 16’ requires 2 pilot/escort vehicles. Over 18′ in width will require a police escort.
Height: Up to 14’ 6” 1 pilot/escort vehicle, over 16’ requires 2 pilot/escort vehicles. Over 18′ in height will require a police escort.
Weight: No requirements as long as you can maintain minimum speeds. However, on bridge moves that require all other vehicle traffic to be removed will require an appropriate number of pilot cars which is a minimum of 2 and possibly 3 with police escort. All areas are different and require evaluation.
Note: If you exceed any two dimensions, then you are required to have an additional pilot car. So if you’re over 14′ 6″ tall and 14′ 6″ wide you would be required to have 2 pilot cars.
Required pilot car certifications:
Cars, vans, or trucks may be used as long as the gross weight of the pilot car vehicle is rated at no more than 8,000 lbs. Pilot car driver must be 18 years of age minimum with a valid regular driver’s license. Pilot cars must have a rotating or flashing amber light mounted on the top of the vehicle. Must display a red flag at all 4 outermost points of the vehicle and have “OVERSIZE LOAD” signs that are a minimum size of 5′ wide x 12″ tall and have black lettering no less than 8″ in height. Must have radio and be in constant communication with the driver transporting the shipment at all times. Must have $500,000 per occurrence combined insurance that covers property and body.
How to apply for trucking permits:
Illinois Department of Transportation – DOT
Bureau of Traffic, 2300 S Dirksen Parkway
Springfield, IL 62764
Email: dot.permitoffice “at” illinois.gov
General inquiry phone: 217-782-6273
Phone: 217-785-1477 or 800-252-8636 within the state.
Note: Fee varies depending on dimensions and miles traveled. A permit is valid for 5 days.
Hours: from 8 AM until 4:30 PM
Central Time Zone