ABSTRACT
The Fourth Amendment imposes two requirements for searches and seizures, in general, to be valid: a search warrant or probable cause. The rule is different, however, in vehicular stops and searches because motor vehicles are mobile and can be driven away at any time, making obtaining a warrant impractical. The leading cases briefed in this chapter on vehicle stops and searches are Carroll v. United States, New York v. Belton, United States v. Ross, and Wyoming v. Houghton.
