Web Tech Gadgets Internet Marketing Blog about Web 2.0, Social Media , Technology , Mobile , SEO , Robotics , Gadgets , Science , Video Games and Geek . Stuff Home Facebook Twitter Google Directory About Contact 22 Sept 2011 Electric Personal Rapid Transit PRT at Heathrow London Heathrow Airport has implemented electric vehicles for transportation without driver , called Personal Rapid Transit PRT These new autonomous electric cars with controlled temperature should carry up to 500,000 passengers a year between Terminal 5 and car parks . They will replace 50 000 shuttle bus trips per . year Passengers can board in at any time and press the Start” button . Each time they are stopped , the Pods will recharge themselves while awaiting the next passengers . They drive alone at a speed of 25 .