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I second that, if anything the roads only need to be patched. The roads also have their cracks sealed every few years causing them to last even longer than drive ways normally do.

This is only true if it is built to high spec, I know some neighbor cul-de-sac in my town are not "Town" roads. They do not get plowed or town maintenance because the builder didn't build it to high enough / correct spec, and the home owners are required to pay for these things.

I suspect that number varies significantly with climate. Strongtowns is based out of Minnesota, land of snow, studded tires, plows, and temperatures forty below zero.

14 is the average, and yeah, I think he failed to account that less used roads (such as cul de sacs) can be replaced much less often.

yeah 14 years.. our HOA is required by TX state law to collect revenue such that it can replace the roads every 30 but I have a feeling they will last 50+ given my previous neighborhoods.