Requiring new highway expansions to mitigate this effect by encouraging more eco-friendly means of transportation acknowledges the actual needs of those served by expanded highways while minimizing (or even reducing) harm to the environment.
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@BCTNCQ5 2mos2MO
Especially in California, we've tried time and time again to mitigate traffic congestion by widening our freeways; and almost every time we've done so, there's been little to no improvement in commute times. Adding more lanes to a freeway might actually cause *more* traffic by encouraging more people to drive on it, and this phenomenon has been widely known in transportation planning circles as induced demand.
I agree that reducing harm to the environment is important, but expanding freeways won't help tackle the root cause of congestion. We need to go further-- by both a) planning better, mixed-use cities, bringing shops and workplaces closer to our homes, and b) investing more in building out and maintaining expansive, frequent, and reliable public transit networks in our cities.
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