So, mbkennel, your solution is no solution? The two ideas you presented are hi-tech nonsense, and wouldn't have an impact anyway.
The first step is lowering speed limits to forty and using draconian enforcement - 10 over = 1 month in a Mexican-style jail [provide your own bed and food]. The problem is very serious and pussy-footing won't solve it!

Solutions must also be politically and economically possible. If your solution were politically possible, demand would drop and gas would get cheap, then someone would use it. In the long run there is only one answer, energy must be more expensive. This will almost certainly happen.