Does a police officer have authority to stop every car that comes along?

8 "It is no answer to say that it was the officers' intention to stop every car that came along, regardless of other circumstances. The validity of stops and searches and arrests is determined by an objective, not subjective, standard. Thus, even if officers erroneously rely on a specific doctrine or presumption as entitling them to make a search or arrest, their action will be sustained if it was objectively justifiable on other grounds. Accordingly, even though the officers improperly relied upon their supposed authority to stop every vehicle on the road, they had facts within their knowledge amounting to a founded suspicion such as to make these particular stops constitutional and the stops must be upheld."

United States v. Vital-Padilla, supra at 644 (citations omitted).