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 Wisconsin, the offense of speeding in a construction or work zone is taken very seriously. Wisconsin Statutes section 346.57(4) stipulates that no person shall drive a vehicle in excess of speed zones when passing a highway maintenance or construction area or utility work area that is marked with signs. The law applies regardless of whether workers are present. The fines for speeding in these zones are indeed higher than for non-construction areas. Under section 346.60(3)(a), the penalty for speeding in a construction zone can be doubled if workers are present. Additionally, demerit points may be added to the driver's license, which can affect insurance rates and driving privileges. Drivers are expected to adhere to posted speed limits and adjust their speed according to road, weather, and visibility conditions to ensure safety. It's important for drivers to be aware that the reduced speed limit in a construction zone continues until they see a sign indicating that the speed limit has increased, which may be beyond the physical area of construction barriers or equipment.