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 Pennsylvania, speeding in a construction or work zone is a serious offense. The state enforces reduced speed limits in these areas to ensure the safety of workers and drivers. These limits are applicable regardless of whether workers are present, and the zone is marked with appropriate signage. The Pennsylvania Department of Transportation (PennDOT) and the Pennsylvania Turnpike Commission may activate flashing lights on signs to indicate when the work zone speed limit is in effect. Drivers must adhere to the posted speed limits from the first sign indicating the beginning of the work zone until they pass the sign that marks the end of the work zone. Penalties for speeding in a work zone in Pennsylvania are more severe than for non-work zone violations. Fines for such infractions are doubled, and repeat offenses can lead to a 15-day driver's license suspension. Additionally, accumulating points on one's driving record can lead to further consequences, such as increased insurance rates and additional suspensions.