More than half of all crashes: Question More than half of all crashes: Answers Occur at speeds greater than 35 mph. Happen at night. Are caused by worn tires. Involve riders who have operated the involved motorcycle for less than six months. Explanation More than half of all motorcycle crashes involve riders with less than six months of experience on the motorcycle being used. This questions appears in the following tests: Indiana Motorcycle Practice Test 16 Iowa Motorcycle Practice Test 20 Maine Motorcycle Practice Test 12 Maryland Motorcycle Practice Test 22 Michigan Motorcycle Practice Test 17 Michigan Motorcycle Practice Test 16 Minnesota Motorcycle Practice Test 39 New Hampshire Motorcycle Practice Test 24 New Jersey Motorcycle Practice Test 42 New Jersey Motorcycle Practice Test 40 North Carolina Motorcycle Practice Test 8 North Carolina Motorcycle Practice Test 19 North Dakota Motorcycle Practice Test 12 Ohio Motorcycle Practice Test 32 Ohio Motorcycle Practice Test 35 Utah Motorcycle Practice Test 15 Washington Motorcycle Practice Test 20