高速上是例外，没见正常情况下高速上开得低于40都会被罚款？！ 开紧急灯都难说是撞车人的错，

更别说不开紧急灯了。大家看看规则是怎么写的。

Stopping or Parking On the Freeway

You may never park on an interstate freeway except in an emergency where you cannot drive your vehicle to the nearest exit ramp. When this happens, you must park on the shoulder. It is illegal to stop or park in a traffic lane on any highway outside a business or residential district.