PPA begins enforcing parking violations detected by cameras on SEPTA trolleys today. Here's what to know.

Don't be an April fool, and save yourself $51.

Starting Wednesday, April 1, the Philadelphia Parking Authority will begin issuing tickets for parking and traffic violations caught by AI-powered cameras mounted on SEPTA trolleys.

The cameras started rolling last month on 30 trolleys across the SEPTA system's T1 through T5 lines and the G1 route. A warning period began on March 2 to get drivers' attention, but now that warning period is over.

Cameras powered by Hayden AI will be looking for vehicles illegally blocking trolley lanes and stopping zones. After violations are reviewed by a PPA enforcement officer and approved, a ticket will be mailed to the address linked to the vehicle's license plate.

The technology launched on SEPTA buses last spring to crack down on illegally parked vehicles that block bus and trolley routes.

Philly is the first city in the country to use this technology on trolleys, according to the PPA.

"Vehicles parked illegally in trolley or bus lanes cause unnecessary delays. A single illegally parked vehicle can disrupt service for thousands of riders and create unsafe boarding conditions that force passengers into moving traffic," PPA Executive Director Rich Lazer said in a news release.