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 Nevada, speeding in a construction or work zone is considered a serious offense. The state enforces what is known as 'double penalty' laws, where fines for speeding in these zones are typically doubled. This is to ensure the safety of construction workers and to encourage drivers to adhere to the reduced speed limits in these areas. The specific speed limit in a construction or work zone is usually indicated by signs, and it is important for drivers to be aware that these limits may extend beyond the visible area of construction barriers and equipment. Nevada law requires that these reduced speed limits be obeyed regardless of whether workers are present, although the presence of workers often increases the level of enforcement and penalties. In addition to increased fines, drivers may also receive demerit points on their driving records for such infractions, which can affect their insurance rates and driving privileges. It is crucial for drivers to pay close attention to posted signs and road conditions in construction zones to avoid these enhanced penalties.