If the road is wet, you should reduce your normal traveling speed by: Do you currently have car insurance? Insurance is mandatory to drive in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question If the road is wet, you should reduce your normal traveling speed by: Answers 5 to 10 mph. 15 to 20 mph. 25 mph. Half. Explanation If you are traveling on a wet road, you should reduce your normal traveling speed by 5 to 10 mph. Use extra caution when traveling on a slippery surface.