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 Utah, speeding in a construction or work zone is considered a serious traffic offense. The state enforces reduced speed limits in these areas to ensure the safety of workers and drivers. These reduced limits are typically indicated by posted signs, and they apply regardless of whether workers are present, although fines may be higher when workers are on site. Utah law stipulates that drivers must adhere to the posted speed limits or drive at a speed that is reasonable and prudent given the road conditions, weather, and visibility. Penalties for speeding in a construction zone in Utah are more severe than for regular speeding violations. They include increased fines, which can be doubled, and the addition of demerit points to the driver's license. These enhanced penalties are designed to deter drivers from speeding in areas where there is an increased risk of accidents and injuries.