Commercial Driver's License

Answer: B - When operating a commercial vehicle on wet roads, drivers should reduce their speed by at least one-third. This is considered the minimum reduction in speed and some conditions may require even more reduction in speed. An example of a one-third reduction would be if you are traveling 55 mph in dry conditions, you should reduce speed to 35 mph on wet roads. Speed reduction is necessary because of the extra time and distance it will take to bring the vehicle to a full stop on wet roads.