About 300,000 cars cross the San Francisco-Oakland Bay Bridge every day. I think the author's point is that if they were all electric, there would _still_ be 3

About 300,000 cars cross the San Francisco-Oakland Bay Bridge every day. I think the author's point is that if they were all electric, there would _still_ be 300,000 cars crossing the bridge each day, and the problems of road maintenance costs, pedestrian safety, and soul-deadening commute times remain. Fewer GHG emissions, to be sure. A good next step would be to focus on reducing the total energy of the system. Minimizing 1/2 m v^2 is your friend here -- reduce weight and reduce speed.