The border search exception means that certain searches are assumed to be "reasonable" that wouldn't be otherwise. Exactly what searches are reasonable and when

The border search exception means that certain searches are assumed to be "reasonable" that wouldn't be otherwise. Exactly what searches are reasonable and when has always been a bit in flux. https://en.wikipedia.org/wiki/Border_search_exception https://en.wikipedia.org/wiki/Border_search_exception Brief stops for questioning at a fixed post on a highway are legal: https://en.wikipedia.org/wiki/United_States_v._Martinez-Fuerte https://en.wikipedia.org/wiki/United_States_v._Martinez-Fuer... But it seems you can't actually physically search vehicles, unless something has since modified this precedent: https://en.wikipedia.org/wiki/United_States_v._Ortiz https://en.wikipedia.org/wiki/United_States_v._Ortiz