An electric road charging cars

 Electric vehicles are certainly green , but the replenishment
 in battery power has always been a problem . Therefore , Volvo
 imagined a different solution to fix it. Instead of focusing on a
 wireless charging , the group put on roads that recharge the cars.
Volvo worked with the Swedish company Alstom to develop
 project. These two rails laid on a road section to feed
 electric vehicles which pass over .
 These rails are actually two feed lines each representing
 positive and negative pole to conduct current . To test the technology,
 a 400m long road was created in the city of Hällered , Sweden.
 The principle is simple: rolling over , with a collector vehicle
 current can recover electrical energy and use it to stay
 operational. The current of 750V obtained will then be taken to a
 water cooling.
 However , designers specify that lines only work when a car through it. There is therefore
 from electrical hazards if a pedestrian crosses the road electric . In the future, it would allow
 troubleshoot those who are short of full battery drive , or even to go fully recharge at home
 or in a station if the project is extended to all existing roads. Electric cars would become
 completely autonomous and constantly charged batteries.