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 Mississippi, speeding in a construction or work zone is considered a serious offense. The state enforces what is known as 'double fine zones' in areas where road work is taking place. This means that any speeding fines are doubled when the violation occurs in a marked construction or work zone. The increased penalties are intended to ensure the safety of road workers and to encourage drivers to adhere to the posted speed limits. These zones are typically marked with signs indicating the reduced speed limit, and the double fine rule applies regardless of whether workers are present or not. Additionally, the reduced speed limit in a construction zone remains in effect until drivers pass a sign that indicates the end of the zone and an increased speed limit. Drivers in Mississippi should be aware that, in addition to fines, points may be added to their driving records for such infractions, which can affect their insurance rates and driving privileges.