Wireless Charging Electric Vehicle road?

Just saw this video about building a wireless charging road for electric vehicle. It's classic way of just pitching the benefit of conveniency and totally avoiding the critical elements that requires attention. The inefficiency of energy transfer means a good 30% or more energy is wasted during the transfer. I am not sure how to manage to turn on the charging coil just in time for the vehicle arriving but it's going to be a waste if the road is not occupied by electric vehicles. 

Unless they throw in a lot of new innovation to solve these critical factors, it's going to be a non-eco friendly project.

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