Transit, for example, can get better with more ridership: more train capacity is added to a line, and more frequent service may occur for better throughput. Both actions would improve service for each individual rider, so while while one may not want it "crowded", having it busy is good. While with roads, an individual driver may want enough traffic so that a street exists, any traffic beyond that would probably only slow you down.
There are also externalities: more walking, cycling, transit reduces pollution and can improve individual health and the collective health of the population. Driving does the opposite.
Oh The Urbanity had a good video on this, "What People Get Wrong About Induced Demand":
> In this video we explain why induced demand does apply to transit, walking, and cycling infrastructure, but with different consequences.
* https://www.youtube.com/watch?v=8wlld3Z9wRc
Transit, for example, can get better with more ridership: more train capacity is added to a line, and more frequent service may occur for better throughput. Both actions would improve service for each individual rider, so while while one may not want it "crowded", having it busy is good. While with roads, an individual driver may want enough traffic so that a street exists, any traffic beyond that would probably only slow you down.
There are also externalities: more walking, cycling, transit reduces pollution and can improve individual health and the collective health of the population. Driving does the opposite.