What is the number one cause of death and injury in work zones? Question What is the number one cause of death and injury in work zones? Answers Speeding drivers Careless behavior by construction workers Drivers driving too slowly Equipment placed in the roadway Explanation Speeding traffic is the main cause of death and injury in work zones. Drive with special caution when traveling near road workers. This questions appears in the following tests: Alabama Class B Knowledge Test Arkansas Class A Knowledge Test Arkansas Class B Knowledge Test Colorado Class A Knowledge Test Indiana Class A Knowledge Test Kansas Class A Knowledge Test Kansas Bus Kansas Passenger New Hampshire Passenger North Dakota Class B Knowledge Test Pennsylvania HazMat West Virginia Class A Knowledge Test Wyoming Class A Knowledge Test