The pioneering technology which uses small driverless electric vehicles that run on dedicated guideways has successfully been in operation at Heathrow Terminal 5 airport since May 2011. The 5 minute journey on one of Ultra's ((Ultra Global Limited) Pod's takes in the 2km journey between the business traveller's car park and the main terminal building.
Heathrow Terminal 5's ‘Pods' have achieved over 99% reliability since implementation and carried over 750,000 passengers. They have removed over 70,000 bus journeys (and as a result reduced harmful emissions) as well as reducing journey times between the car park and the terminal with a non-stop direct service. From the passengers' point of view, there is never more than a 10-15 second wait for a ‘Pod', in fact, 80% of passengers don't have to wait at all - so in summary, they have been a fantastic success.