Final answer:
The Supreme Court case Maryland v. Wilson established the procedure for police to request drivers and their passengers to exit a vehicle during a traffic stop for officer safety purposes.
Step-by-step explanation:
The Supreme Court's decision in Maryland v. Wilson established the procedure authorizing the police to request that a driver and their passengers step out of a vehicle when stopped for a traffic violation. This decision was based on the principle of officer safety, allowing the police to control the situation and reduce the risk of danger when dealing with traffic stops. It complements the earlier ruling in Terry v. Ohio, which allowed for a 'stop and frisk' based on reasonable suspicion.