Emergency vehicle
（重定向自Emergency service vehicle）
An emergency vehicle is any vehicle that is designated and authorized to respond to an emergency. These vehicles are usually operated by designated agencies, often part of the government, but also run by charities, non-governmental organizations and some commercial companies. Often emergency vehicles are permitted by law to break conventional road rules in order to reach their destinations in the fastest possible time, such as driving through an intersection when the traffic light is red, or exceeding the speed limit. In some states, however, the driver of an emergency vehicle can still be sued if the driver shows “reckless disregard for the safety of others.”