It turns out that the collapse of a freeway in San Francisco has been an ideal opportunity for planners to study transportation patterns and develop different conclusions from the same data.
Conclusion A: People haven't had too much trouble, mainly because the interstate system wasn't that congested to begin with, and there are (thankfully) lots of other highways and alternative routes in the Bay Area.
Conclusion B: People haven't had too much trouble, mainly because they've switched to public transit in huge numbers. A reduction in the number of cars by 10% can bring a drastic reduction in congestion. (via Planetizen)
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