When working close to oncoming traffic, construction trucks, and equipment, highway and street construction workers run the risk of suffering fatal injuries as well as catastrophic nonfatal injuries. In the United States, the majority of fatalities that take place in work zones for road construction involve a worker being hit by a piece of construction machinery or another vehicle. In this line of work, a worker has an equal chance of being hit by a piece of construction machinery operating inside the work zone as by oncoming traffic.