An Easy way to Slash Motor Vehicle Emissions

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Blanket the whole city with wi-fi access. (like Cerritos, California) When you want to travel from point A to point B, tell the central traffic computer. It will then give you a time window in which to begin your voyage and, most importantly, it will ensure that as long as you stay within the window you will always hit green lights.

If you stray from your path, you'll be able to get a new window via the wi-fi network. If everyone's car has gps and is connected to the wi-fi network, the central computer will also be able to monitor the flow of traffic and make adjustments to your itinerary in real-time. Essentially, the traffic computer will be solving a large system of linear, and possibly non-linear, constraints in real-time. Lots of fun... and think of how much more efficient travel will be!! If someone wants to secure funding, count me in.