this post was submitted on 25 Aug 2023
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Today I Learned

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For critics of widening projects, the prime example of induced demand is the Katy Freeway in Houston, one of the widest highways in the world with 26 lanes.

Immediately after Katy’s last expansion, in 2008, the project was hailed as a success. But within five years, peak hour travel times on the freeway were longer than before the expansion.

Matt Turner, an economics professor at Brown University and co-author of the 2009 study on congestion, said adding lanes is a fine solution if the goal is to get more cars on the road. But most highway expansion projects, including those in progress in Texas, cite reducing traffic as a primary goal.

“If you keep adding lanes because you want to reduce traffic congestion, you have to be really determined not to learn from history,” Dr. Turner said.

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[–] solstice@lemmy.world 40 points 1 year ago (6 children)

I thought it was common knowledge of the only way to reduce traffic is to reduce demand on roads, eg more expensive gas and tolls etc.

If you add another lane to the highway you're just gonna attract more people and make it worse.

[–] IronKrill@lemmy.ca 22 points 1 year ago (1 children)

Reducing traffic by raising prices is a pretty piss-poor way to do so if the only alternative is walking or decrepit bus lines. There need to be other measures taken.

[–] Stumblinbear@pawb.social 12 points 1 year ago (1 children)

You mean by.... Fixing the bus lines and adding more public transit?

[–] averagedrunk@lemmy.ml 8 points 1 year ago

Yep. But that has to be done first. The Houston metro has piss poor public transit. Honestly most of the south does.

[–] GiddyGap@lemm.ee 17 points 1 year ago (1 children)

The US is all about more lanes for cars and less public transportation. Congestion be damned. Because "SoCiaLiSm."

[–] joostjakob@lemmy.world 3 points 1 year ago

Funny thing is that congestion is basically queuing for mobility services. And queuing is exactly what you get in communist systems where the state provides for you. So highways are socialism!

[–] droans@lemmy.world 7 points 1 year ago

You can reduce traffic with more lanes, but not just willy nilly. They need to be carefully planned and managed while limiting lane changes.

But a lot of the time, they won't. The issue usually comes from people wanting to change lanes while others are merging on. In high traffic areas, lane changes will slow the traffic down while increasing the risk of an accident. Making alternatives such as different routes, other modes of transportation, or reducing the need for traveling usually work better in cities.

[–] Sightline@lemmy.ml -4 points 1 year ago

By that logic just make driving illegal, problem solved!

Something is left out of the equation because more lanes != more traffic, yet there is ALWAYS someone around saying otherwise. Go drive on the highways in Montana if you don't believe me.