Cities Skylines.... It may be time....

I may, may, start using a mod to get a proper handle on the games traffic. On later stages of the game traffic can be a nightmare.
Traffic Manager: President's Edition looks to be popular.

https://steamcommunity.com/sharedfiles/filedetails/?id=583429740

It's such a pity that the game itself doesn't get some good updates that incorporate these types of mod.