You would think they would have tried this at a PATH station, but it's in Atlanta where they're trying it out. According to WSB television, many of the elevators in the city's MARTA transit system smell so strongly of urine, that customers have to cover their noses while they ride.

The urine sensors will detect when someone is relieving himself and sound an alarm, allowing transit employees to apprehend him. There's also a camera to record the action. One drawback is the cost; the urine detection device costs $10,000 per elevator.