Permits
Wisconsin Overweight Permits are valid for 14 days. Must have the overweight permit prior to entering the state.

Operating Time
Loads not exceeding 12′ wide, 13’6″ high or 100′ long may run 24/7, except between 4:00 PM to 11:00 PM on Sunday, and between 4:00 P.M. to 11:00 P.M. between the fourth Sunday in May and Labor Day. Greater than these dimensions may not run during hours of darkness, not from Noon on Saturday until sunrise on Monday, and not between 4:00 P.M. to 11:00 P.M. between the fourth Sunday in May and Labor Day. Overweight-only can travel 24/7, including weekends and holidays, unless otherwise stated on the permit.

Restrictions
Travel is restricted from 4:00 p.m. – 8:00 p.m. the day prior to a holiday and on major holidays and holiday weekends. Travel is restricted in these counties: Columbia, Dane, Milwaukee, Rock or Waukesha between 4:00 p.m. – 8:00 p.m. on Sundays, and between 4:00 p.m. – 8:00 p.m. on Fridays between the fourth Friday in May and Labor Day. Travel is restricted from 6:00 a.m. – 9:00 a.m. and 3:00 p.m. – 6:00 p.m. Monday through Thursday; 6:00 a.m. – 9:00 a.m. and 3:00 p.m. – 8:00 p.m. on Friday and 3:00 p.m. – 8:00 p.m. on Sunday if traveling on the Milwaukee County Expressway.

Speed Limit

Maximum posted limits unless otherwise specified on permit.

Legal Dimensions
The vehicle must have the following characteristics:

Width: 8’6″
Height: 13’6″
Length: 53′ semi-trailer on designated highways (where kingpin to axle does not exceed 43′), 75′ overall on other roads
Overhang: 3’ front; 4’ rear
Weight: 80,000 Gross; Single – 20,000; Tandem – 34,000; Tridem – 42,000
Routine Wisconsin Oversize Permit Limits
Width: 16′
Height: Depends on routes
Length: No set limit
Weight: Single – 20,000 (with 4 tires) Tandem – 65,000 Tridem – 81,000

Escorts
Width: Over 15′ – 1 escort
Height: Depends on route
Length: Usually not required

Security Measures
“Oversize Load” signs are required when the vehicle exceeds 10′ wide or is over length. Red or orange flags, 18″ square, are required at the front and rear corners of over width loads, and at the widest point of any load which is more than 4″ wider than the vehicle or the front or rear corners of the load. An overhang requires a single flag to be fastened at the extreme rear of the load if the overhang or projecting portion is 2′ wide or less. If overhang is over 2′ wide, 2 flags are required. When moving during hours of darkness, lights are required at the outermost extremities, an amber lamp is needed in the front and a red lamp is needed at the rear. Amber lights are also required where the load extends beyond the width of the front or rear edges. When load overhangs more than 4′ beyond the rear of the vehicle, red lamps are required to indicate maximum width and length.