Hey all,   
I've been making this city for, idk, a couple weeks now, and I've tried everything to make the notifications go away, and I'm certain now that my health, death and trash problems are all traffic related. I don't know how to really get started fixing the traffic flow, and need help! I've made a few optimisations already; namely, taking that highway seen in the first image's top view, and disconnecting it from local roads; and turning a 4 way highway intersection and removing the arm leading into the city on the other side of the river, and connecting the main city to the coastal area below with local roads instead.   
I've included a picture of each area with a lot of traffic and gridlock, and the two traffic overlays for each region (shifted to top view to show detail clearly). I do use a few non-Region Pack mods, most importantly Anarchy, Traffic Controller, Move It, and some expanded 6 and 8 lane two way highways, among others.   
If you need any more specific views or closeups on areas, let me know, I didn't know what to screenshot and how to best illustrate the problems. I can share my city save if you want, I'd be very grateful, but a) I'd rather fix these things myself on my own save, to make sure I understand why they work, and b) my computer is \*awful\* and has to run everything on the lowest settings possible, in case that affects your decisions, or matters in any way, just thought best to warn y'all.   
Many thanks if anyone can help!

Help! Traffic Fixes Needed?