Do you currently have car insurance? Insurance is mandatory to drive in California Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question A posted speed limit for cars: Answers Is usually safe for buses. May be too fast for buses. May be too slow for buses. Explanation Particularly on curves, the maximum posted speed limit may be safe to be driven in a car but too fast to be driven in a bus. Be especially careful when the road has been made slippery by rain or snow. Take a FREE Practice Test Now