I recently updated the traffic with some Traffic A.I. DLC/Workshop MOD and wish I had done it sooner. I went to the Workshop page > AI and just picked the most popular one.
Traffic acts much better now, it feels more like real traffic and changes throughout the day but it's generally heavier. You get banked up at some stop signs too, but the wait feels more authentic. I don't know why I didn't apply any of these before - previously I have just added cosmetic stuff.
Are there other mods you guys use, apart from the cosmetic stuff?
Are you using that ontop of ProMods?