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 Maine, the offense of speeding in a construction or work zone is taken very seriously due to the increased risk to workers and the public. Maine law stipulates that drivers must adhere to posted speed limits in construction zones, which are often lower than the regular speed limits to ensure safety. These reduced speed limits apply regardless of whether workers are present, and the zone typically extends beyond the visible area of construction barriers and equipment. The area where the reduced speed limit is enforced will be clearly marked with signs, and the limit remains in effect until drivers are notified by signage that the normal speed limit has resumed. Penalties for speeding in a construction zone in Maine are more severe than for non-construction zone violations. Fines are increased and may be doubled, and demerit points are added to the driver's license, which can affect insurance rates and driving privileges. It is important for drivers to remain vigilant and comply with all posted speed limits, especially in construction zones, to avoid these heightened penalties and to contribute to a safer driving environment.