Police Ticketing Informal Rideshare Participants Based On No Law, But To Protect Port Authority Revenue

"You see, if you are in a carpool (of at least 3 people) and cross the George Washington Bridge (between the Bronx and New Jersey) you save $6 on the toll. That's a decent-sized savings, so people have set up an informal sort of ride share, in that those who want to get across will wait at a nearby bus station, and drivers will swing by and pick them up for the ride. The riders get a free trip across the bridge... and the driver gets a lower toll. Win-win."