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 Tennessee, speeding in a construction or work zone is considered a serious offense. The state enforces what is known as the 'Move Over Law,' which requires drivers to move over or slow down for construction workers and vehicles that are stopped with flashing lights. The law is applicable not only to emergency vehicles but also to highway maintenance vehicles and any other stationary vehicle with flashing lights. If a driver is caught speeding in a construction or work zone in Tennessee, the fines are indeed higher than for non-construction zone speeding violations. The fines can be doubled, and the offense may also result in demerit points being added to the driver's license. It is important for drivers to pay attention to posted signs indicating the beginning and end of construction zones, as well as any temporary speed limit signs. These regulations are in place to ensure the safety of both the workers in the construction zone and the drivers passing through. The specific penalties and procedures for contesting a speeding ticket in a construction zone can be found in the Tennessee Code Annotated (T.C.A.).