Three separate traffic stops this week revealed drivers using low-tech methods to hide plate numbers, even as some motorists employ sophisticated flipping devices to dodge tolls.

There was no visible evidence that the SUV traveling in front of us on a New York interstate had a license plate. An opaque tarp was draped over bicycles that were hanging from a rack on the tailgate.

Drivers across the U.S. are opening their mail to find toll invoices for roads they never traveled, and authorities say a fast-growing license plate cloning scheme is to blame. The scam involves ...

Because the toll for his tractor-trailer to go onto the George Washington Bridge is $65, Nelson Vaquiz decided that it was much easier to build a contraption that lifts up and hides his license plate ...