WASHINGTON (AP) — The Supreme Court's justices put themselves in the driver's seat Tuesday, hearing arguments in two cases involving vehicle searches, but it was unclear what routes the justices will take to resolve the cases.

One case involved Pennsylvania state troopers' stop of a rental car driven by a man who wasn't on the rental agreement. The second involved a policeman's search for a stolen motorcycle in Virginia.

"One of the things that I think is very important in these types of cases is the ability to give clear guidance not only to the courts but to the police," Chief Justice Robert...