11 Jul '11, 3pm

Study shows that more roads do not solve congestion problems - they only attract more cars.

Study shows that more roads do not solve congestion problems - they only attract more cars.

NPR reported on the study as LA was gearing up to close 10 miles of Interstate 405 for the weekend to allow for the latest phase of a $1 billion widening project. But University of Toronto researchers found that instead of providing relief for existing traffic, widening and building more roads leads directly to more traffic : "What we found was that in cities where there was more roads, there was more driving," economist Matthew Turner, a co-author of the study, tells weekends on All Things Considered host Guy Raz. "In particular, if you had 1 percent more roads, you had 1 percent more driving in those cities." Changes in public transportation, however, had no effect on traffic, according to the study—riders will fill newly-created space on buses and trains, but traffic congestion will remain the same. Turner told NPR that's because: "As you add roads to a city those roads...

Full article: http://www.treehugger.com/files/2011/07/building-more-roa...

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