Commuting trends: transit vs driving vs ...

[tomh009]

You’re right that in actual application it would be a marginal effect, where each new project would save a little bit, and over time the road network would become less unaffordable. (...)

I think with proper framing it could be quite successful. Would probably be good to simultaneously look at smaller fire vehicles, as I understand them to be one driver of excessive road width (and they have the trump card of “safety”, even though your point is that wide roads are unsafe in their own ways).

Now, who has the information and can do the back-of-the-envelope calculation for reducing lane widths for 1km of street, assuming that the street is due for repaving anyway? Or knows someone who can?