Go and actually look at the cost of those projects. Adding another line to a major highway is incredibly expensive both now and in maintenance and has a minor impact on avg speed of travel.

From a European perspective American cities already look like a bunch of highways with to occasional development of identical looking single family homes sitting between the highways. The idea that putting down even more road infrastructure is gone improve anything is bonkers.

The amount of road, water pipe and other utilizes the city has to support per citizen has exploded to an absurd degree and is a big reason why most US towns can't maintain their infrastructure. Actually utilizing existing infrastructure in a better way would be far more useful building new one.