Question The leading factor resulting in death and injury in work zones is: Answers Speeding. Stopping. Under-inflated tires. Explanation The leading cause of injury and death in roadway work zones is excessive speed by passing drivers. Lower your speed when driving through a work zone. This questions appears in the following tests: Iowa Double Kentucky Class A Knowledge Test Louisiana Double Minnesota Class A Knowledge Test Mississippi Class B Knowledge Test Mississippi HazMat New Mexico Double Tennessee Class A Knowledge Test Virginia Class B Knowledge Test Virginia Passenger