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Counting People, Not Cars

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"You build a Walmart and we can tell you how many car trips it will generate, on which roads, and at which times of day. We know next to nothing about how and where people bike and walk in this country," says a transpo advocacy guy. To that end, the National Bicycle and Pedestrian Documentation Project is using high-tech sensors that track people's weight or heat across 150 cities, including San Francisco, NYC, and Kansas City, to figure out how and where self-propelled people go. A planner: "It's a great relief to have robots out there counting ? rain or shine." [USA Today]