This article presumes people give a rat's ass about saving fuel or driving safely. As those of us who drive on a regular basis can attest, more and more people seem to be of the mindset that no matter what, they will accelerate as hard as possible just so they can slam on the brakes as hard as possible at every opportunity.
This morning I had a guy literally on my rear bumper (less than 1 meter) and when it looked like there might be an opportunity for him to jump into the lane next to get around around me, he tried to take it. Unfortunately for him he misjudged the line of cars in that lane and had to swerve back behind me.
He wasn't going to get anywhere faster as there was a red light for us (a left turn), and he would have only gotten one car ahead, but by golly he was going to use every drop of fuel he possibly could just to try and do it.
I, and others, can relate story after story about people like this, and the only thing this proposal will do is add costs to vehicles (and those driving them when the system breaks down), cause more people to try and beat the red light which means more accidents, as well as people slamming on their brakes when they misjudge the timing, also causing more accidents.
Once again, we are trying to find a technical solution to a human problem rather than fixing the human problem.