Question On a wet road, you should reduce your speed: Answers By about one-half. By about one-third. By about one-quarter. By about one-eighth. Explanation You should reduce your speed by about one-third when driving on a wet road. It can be difficult to stop or turn when operating on a slippery surface, so you must adjust your speed to drive safely under such conditions. This questions appears in the following tests: Indiana Class A Knowledge Test Indiana Class B Knowledge Test Mississippi Class A Knowledge Test New Jersey Tank North Dakota Tank Tennessee Class A Knowledge Test Wyoming Class A Knowledge Test