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 Connecticut, speeding in a construction or work zone is considered a serious offense. The state enforces what is commonly known as the 'double fine zone' law. This means that fines for speeding in a designated construction or work zone are doubled if the zone is properly marked with signs indicating the reduced speed limit. The law applies regardless of whether workers are present or not. The intent is to ensure the safety of construction workers and other motorists by encouraging drivers to slow down in areas where road conditions may change due to construction activities. The specific penalties and fines can vary, but they are generally much higher than for non-construction zone speeding violations. Additionally, points may be added to the driver's license, which can affect insurance rates and driving privileges. It is important for drivers to pay close attention to signage and adhere to posted speed limits, especially in construction zones, to avoid these increased penalties.