The infraction or offense of speeding in a construction or work zone is committed when the driver of a motor vehicle in a marked construction/work zone exceeds the posted speed limit or exceeds the speed limit that is reasonable and prudent under the circumstances or conditions—conditions such as the road (straight, curved, wet, dry, icy, flat, hilly); the weather (clear, foggy, raining, snowing); and the visibility (smoke from a grass fire or a tractor trailer obstructing the view).

Laws vary from state to state and in many states the construction or work zone speed limit only applies when workers are present and the zone is clearly marked with signs. But drivers should be aware that the construction or work zone often extends past where barrels or other barriers have been placed on the road and the reduced speed limit continues to apply until there is a sign indicating an increased speed limit.

Laws regarding speeding in a construction or work zone (and their enforcement) vary from state to state and among cities and towns (local ordinances) and are usually located in a state’s statutes. The penalty for speeding in a construction or work zone is usually a fine and demerit points added to the driver’s license or driving record. But the fines and penalties for speeding in a construction zone are usually much greater than for a typical speeding ticket or citation—for example, fines may be doubled.

In Minnesota, speeding in a construction or work zone is considered a serious offense. The state enforces specific statutes that impose higher fines and penalties for drivers who exceed the posted speed limits in these zones. Minnesota law requires that the reduced speed limits in construction or work zones are to be obeyed regardless of whether workers are present, although the presence of workers may increase the penalties. The fines for speeding in these zones are typically doubled, and this is intended to enhance safety for both the workers and the drivers. Additionally, drivers who are caught speeding in these areas may also receive demerit points on their driving record, which can affect their insurance rates and driving privileges. It is important for drivers to pay close attention to signage indicating the beginning and end of construction zones and to adjust their speed accordingly to comply with Minnesota's traffic regulations.