In addition to the above, an additional escort vehicle is required if the oversize vehicle or combination has been granted a waiver and is traveling during the nighttime hours of sunset to sunrise.
When one escort vehicle is required, it must precede the escorted vehicles on highways having less than four traffic lanes and must follow the escorted vehicles on highways having four or more traffic lanes. When two escort vehicles are required, one must precede the escorted vehicles and one must follow the escorted vehicles.
When three escort vehicles are required, one must precede the escorted vehicles, one must follow the escorted vehicles, and one must travel in the adjacent lane alongside the escorted vehicles on all highways having three or more lanes. When three or more highway lanes are not available, the third escort vehicle must also follow the escorted vehicles.
A preceding escort vehicle must maintain a distance of from 200 feet minimum to 500 feet maximum from the lead vehicle of the escorted combination of vehicles. A following escort vehicle must maintain a distance of from 100 feet minimum to 250 feet maximum from the rearmost vehicle of the escorted combination of vehicles.
Low beam headlamps and red tail lamps shall be illuminated on all escort vehicles.
Warning flags must be displayed on the two front corners of a preceding escort vehicle and on the two rear corners of a following escort vehicle.
When two escort vehicles are required, a warning sign must be displayed on the front of the preceding escort vehicle and on the rear of the following escort vehicle. When only one escort is required, a warning sign must be displayed on the rear of the rearmost vehicle in the escorted combination and on the front of the escort vehicle if it is preceding, or on the front of the lead vehicle of the escorted combination and on the rear of the escort vehicle if it is following.
| Daytime | Operation under an oversize permit is limited to the daytime hours of sunrise to sunset on any highway where clear space available for use by passing traffic is less than 10’. | |||
| Weekend | NS | |||
| Holidays | If the holiday falls on a Sunday, operation is not permitted the following Monday. If the holiday falls on a Saturday, operation is not permitted on the preceding Friday. An oversize vehicle may not operate on the following holidays: • New Year’s Day • Memorial Day (and the Friday before Memorial Day) • Independence Day • Labor Day (and the Friday before Labor Day) • Thanksgiving Day (and the Wednesday before Thanksgiving Day) • Christmas Day | |||
| Visibility | Operation is prohibited when visibility is a less than 500’, and hazardous road conditions are present. | |||