Scientists replaced 40 percent of cement with rice husk cinder, limestone crushing waste, and silica sand, giving concrete a rubber-like quality, six to nine times more crack-resistant than regular concrete. It self-seals, replaces cement with plentiful waste products, and should be cheaper to use.

[u/mvea]

https://newatlas.com/materials/rubbery-crack-resistant-cement/

[u/theguyfromgermany]

Roads are usualy made of asphalt

[u/leno95 → u/theguyfromgermany]

A surprising number are made of concrete, and the majority of those are suitably placed. However in the UK (south-western stretch of M25 orbital around London), and some parts of Europe you'll find concrete road surfaces.

Roads should be made of asphalt/tarmac in all honesty.

[u/N8dogg86 → u/leno95]

Asphalt roads are just surfaced with asphalt. Typically, there's a 12" to 18" base of concrete underneath asphalt roads for support. This makes it easier and cheaper to maintain and resurface. However, in northern regions where snow and ice are factors asphalt won't hold up as well against snow plows. This typically makes concrete as cost effective as asphalt over time because there's less maintenance (potholes, resurfacing) and repair.

My city has a big problem in winter and early spring repairing potholes. So much so it costs us over $5million in vehicle repairs, that the city will pay, from damages due to potholes. 90% of those potholes are in asphalt roads. IMO, there should be a regional divide as to where concrete roads are used vs asphalt roads.

[u/leno95 → u/N8dogg86]

The divide would be the best way to keep road costs lower.