TRANSPORT EV - Electric vehicle on the expressway without a battery - Masahiro Hanazawa and Takashi Ohira

Future electric vehicle to race on the expressway without a battery! 
energy transfer from the road to a running vehicle using a feeder system.
The source of energy from power lines is up-converted into radio frequency (RF) by high-speed inverters implanted along tracks in the road. The RF voltage is applied to a balanced metal track embedded under the surface of the road. The EV picks up the RF voltage via electrical capacitance between the metal and a steel belt installed inside of the tires of the EV.
http://www.ecofriend.com/entry/future-electric-vehicle-race-expressway-battery/ 

http://www.tut.ac.jp/english/newsletter/tech_overtures/index.html