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How highways make traffic worse

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Channel: Vox
Categories: Society / Culture   |   Science   |   Social Science   |   Technology  
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Expanding highways doesn't do what you think it does.

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Big, expensive highway expansion projects are the source of a lot US transportation funding but they aren't a silver bullet for congestion relief. In communities that were built for cars, solving traffic problems requires much more holistic problem-solving.

At 1:00, we show a bar graph of travel times on the Katy Freeway that was originally put together by City Observatory, which has covered the Katy Freeway expansion project at length:

This video was based in large part on research by Gilles Duranton and Matthew A. Turner:

For more reading on induced demand:

For Kyle Shelton's work on urbanism: is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out

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