Do the cops and ambulance cross red light when theirs an emergency?
There are some exceptions to this rule, such as in the case of a school bus or a pedestrian in a crosswalk. In these cases, even police cars and ambulances must wait for the green light before proceeding.
It's important to note that the laws and regulations regarding police and ambulance use of red lights can vary from country to country, and even from state to state. Therefore, it's always best to consult the local laws and regulations to determine the specific rules in your area.