Factorio Forums

someone please add better and more cars along with roads and stoplights!

There's not real way to accomplish that yet. Not in any meaningful fashion anyway.
Other than simply making entities and backgrounds that look like what you're asking, they won't accomplish anything, as there's no framework to base it on.
e.g. Cars won't align with roads, traffic lights won't affect cars.

If all you're looking for is something that looks like roads, then check out the Roadworks mod.

piggy2 wrote:someone please add better and more cars along with roads and stoplights!

i suggest gta2, it has everything factorio has (except for all the factory stuff) but has better and more cars. And also roads and stoplights, and even pedestrians!
Seriously, give it a try

And it's technically free too!
Technically, since the official source of the download is down, but they released the executable to public domain just the same.