What I wonder about is why hasn't someone developed a device that drivers could install in their cars to "optimize" their flow through traffic? I mean, most people wouldn't see such a thing terrible useful for their own short-term, short-sighted purposes, but if enough people incorporated it, the efficiency boost could be substantial. Less time in commute, less gas consumption, less vehicle emissions, less frustration, etc.
I think insurance companies could give discounts to people who use such devices simply because it could help improve overall traffic conditions; improved conditions = lowered driving risks overall.
Just my 2 cents.