A work zone is an area of a highway with construction, maintenance, or utility work activities. A work zone is typically marked by temporary traffic control (TTC) devices consisting of signs, channelizing devices, barriers, pavement markings, and/or work vehicles. A work Zone extends from the first warning sign or high-intensity rotating, flashing, oscillating, or strobe lights on a vehicle to the END ROAD WORK sign or the last TTC device.

• Every year, more than 1,000 fatalities occur in our nation's workzones.
• More than 40,000 people are injured each year as a result of motor vehicle crashes in work zones.

For more information on work zones in general, please visit link below:
FHWA Safety Website: Work Zone Mobility and Safety Program