Emergency vehicles; exempt from certain traffic regulations.

Emergency vehicles; exempt from certain traffic regulations. Authorizes a law-enforcement vehicle, defined in current law, operated by or under the direction of a federal, state, or local law-enforcement officer to disregard parking and stopping provisions and expands the situations in which such vehicles may disregard speed limits to include when establishing evidence of other violations of law and when responding to an emergency in which emergency lights and siren may pose a safety risk.