I would agree with you.
In terms of the practical implementation of something like that, I think you would need to have some type of standard identifier that you could put on the vehicle. So when the vehicle is registered, it would either qualify for this right or not. You would have to have some easy means of identifying that vehicle, maybe with a decal on the licence plate or a different colour of licence plate, or something like that so that those who are out there enforcing or regulating this could easily see that the vehicle was able to be in those lanes because it was an alternative fuel vehicle.