How highways make traffic worse
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:
https://cityobservatory.org/reducing-congestion-katy-didnt/
This video was based in large part on research by Gilles Duranton and Matthew A. Turner:
https://www.aeaweb.org/articles?id=10.1257/aer.101.6.2616
For more reading on induced demand:
https://www.wired.com/2014/06/wuwt-traffic-induced-demand/
https://www.bloomberg.com/news/articles/2018-09-06/traffic-jam-blame-induced-demand?sref=PxYB8Mnq
For Kyle Shelton’s work on urbanism:
https://kinder.rice.edu/urban-edge/author/541
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