Question A primary cause of single-vehicle collisions is: Answers Motorcyclists' tendency to ride too fast for weather conditions. Motorcyclists running off the road while trying to avoid a collision with another vehicle. Motorcyclists falling asleep while riding. Motorcyclists taking a curve too wide or too fast. Explanation A primary cause of single-vehicle collisions is motorcyclists running too wide in a curve or turn. Improperly cornering can cause a motorcycle to leave the roadway or collide with an object. Take a FREE Practice Test Now This questions appears in the following tests: Washington Practice Test