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How practical would electric vehicles on special toll roads sided with electric coils be?

Hi All,

I have an idea of hybrid vehicles having gasoline engine and electric motors (but without batteries) plying on special toll roads lined by electrically excited coils which will transfer electrical enegry to some coils similarly installed in the vehicles which create the electricity to run the Motor, so can electrically run without need to carry heavy batteries all the way and not limited by a battery pack. and could be used by as many vehicles on roads. and same road could also be used by normal gasoline vehicles. Only need to charge extra for this special vehicles installed with electric motors using electricity provided. When cutting the flux lines created by fixed coils on side of the roads , the coils inside vehicle can create the electrical engery to run the electric motor in theirvehicle.

Kindly tell me any flaws in this plan and could also suggest how to overcome that.


  • Jan 22 2014: But if we are putting rail track s or powerlines on road itself the vehicles are constrained to that particular track and not free flow of rest of the traffic.

    Also i agree that electricity is generated by coal etc... But i heard that gasoline engines are very inefficient after speeding up, most of the energy is used to overcome friction created by engine itself and running its supplementary serivces like oilpump, coolant pump etc. Gasoline is efficient constant heavy loads as per my understanding.
    As i expected the prob is that a big health problem of humans cutting fluxed created by coils. and is it workable in wide area as side of road or under the roads to the vehicles...
    Already the technology is there as phones can be charged wirelessly.. but in this case phone is not moving. In our situation the vehicle is already moving and it continues like.... CONSIDER THIS LIKE ROAD A STATOR AND VEHICLE AS A ROTOR OF A CEILING FAN. ThankYou, Regards
    • Jan 22 2014: Electric fields grow exponentially weaker with distance. The advantage a coil would have over a line or rail would be that you could go off road with it for about 5 meters. This in no way makes up for the lower efficiency.

      Phones and such are charged wirelessly partially because they consume very little power compared to say, a car. Wasting some power doesn't hurt all that much, because its a little amount either way. With the larger power draw of vehicles, it actually hurts quite a bit.

      You either need to have your power supply on you, or connected via a cable. Any other option is problematic.
  • Jan 21 2014: Ok I read over it again and I understand what you are saying now. So the thing you are talkig about is called energy broadcasting. It was origanally theorized by nikola tesla( I have a conversation about this I'm the ideas section) and it has never been conclusively proven in science. If you can make it work, kudos, but you will have a lot of people going for the railroad tracks
  • Jan 21 2014: Are you talking about the concept of a rail gun but with a car as a projectile? If so maybe this could work but I agree with nadav. The electrified railroad tracks woulld be easier. Also, you have to ask if he human body could stand that force. I mean a pilot could, but you take a average joe and put him in a rail gun, he might pass out
  • Jan 21 2014: Wouldn't it be easier to simply install a set of railroad tracks or power lines in the middle of the road for much the same purpose?
    They could be built in a way that still allows normal cars to use the road, but without messing around with wireless power transfer (quite inefficient; also driving through a strong magnetic field fries electronics).

    Or better yet, just use a normal road. Let me remind you that most electric power today is coal generated, which in many ways actually pollutes more then the oil your car burns.