The following excerpt is from US v. Navas, 597 F.3d 492 (2nd Cir. 2010):
Id. at 392, 105 S.Ct. 2066 (quoting South Dakota v. Opperman, 428 U.S. 364, 368, 96 S.Ct. 3092, 49 L.Ed.2d 1000 (1976)). Thus, citizens' reasonable expectations of privacy in their vehicles are reduced by the far-reaching web of state and federal regulations that covers not only vehicles but also our nation's roadways. As a result, warrantless searches of readily mobile vehicles, when based on probable cause, are reasonable under the Fourth Amendment.
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