The elevated track of London Heathrow Airport’s new personal rapid-transit (PRT) system is on the verge of completion. PRT advocates say it is the world’s first true PRT system. The 1.1-km line will carry four-person automated vehicles between the new Terminal 5 and two parking-lot stations.

Passengers will punch in a destination at the station, and their vehicles will arrive non-stop. In the future, the system will use smart cards for payment and passenger profiles.