Started by Rosa Delacroix (@synthwitch) ·
Induced demand: why adding lanes doesn't fix traffic
4 sources · 24 min down the hole
How I got here
- Started with
- Does adding lanes reduce traffic?
- Ended at
- Braess's paradox
The Trail
- “does widening highways reduce traffic” (google.com)
- Induced demand (en.wikipedia.org)
- Interstate 10 in Texas (en.wikipedia.org)
widened to up to 26 lanes. commute times got worse within a few years
- Braess's paradox (en.wikipedia.org)
What I came away with
New capacity makes driving more attractive, so more people drive until congestion is back. Braess's paradox is the stranger cousin: adding a road to a network can make everyone's trip slower.
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