No, we're not talking about robotic charging stations that roam the highways and recharge your car without even stopping (sadly), but a new system proposed Zafer Sahinoglu and his colleagues at the Mitsubishi Electric Research Laboratories in Cambridge, Massachusetts may just help to fill in some of the gaps on the road. While exact specifics are a bit light, the basic idea is to have a series of "roaming" chargers that would be charged up at night and moved around based on demand -- demand that would be determined by sensors in electric vehicles, which would report their findings back to a central operations center. According to Sahinoglu, you'd only need five charging stations to cover 100 electric cars on a 100-kilometer stretch of highway, so it would seemingly be a quick and relatively inexpensive way to cover a large area -- assuming you can find an efficient way to actually move the chargers around. Look for more details to be announced at the Vehicular Technology Conference in Ottawa next week.