You must obey the speed limits for the road and for your vehicle. 驾驶速度不可超过该道路及车辆本身类别的车速限制。
After a rash of minor vehicle pedestrian accidents, the USAF commander decided to reduce the speed limit to three m.p.h. 因为多次出现汽车撞伤行人一类不甚严重的车祸,美国空军司令员决定将车速限制在每小时三英里。