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This article is horrible. The author also states that > One is that, for the most part, driving lanes weren't actually eliminated when they bike lanes were bui

This article is horrible. The author also states that > One is that, for the most part, driving lanes weren't actually eliminated when they bike lanes were built — they were simply narrowed. But there is nothing to support the claim that narrower lanes speed up traffic. Also this phrase is copy pasted verbatim further down the article.

kazinator 12y ago
This comes from simple fluid dynamics. When a fluid is forced into a narrower pipe, it goes faster. (Venturi also tells us there is a drop in pressure, but it's not clear how this advanced aspect is applicable here.)
snogglethorpe 12y ago
> But there is nothing to support the claim that narrower lanes speed up traffic My impression is that the opposite is actually true: narrower lanes tend to make drivers feel more nervous/wary, and they slow down as a result. Lane-narrowing (and "perceptual" narrowing, adding features that make it seem narrower to drivers without actually changing the amount of space) seems to be a fairly common traffic-calming technique.