Thanks for your replies guys !
This is a bit wider view of the entire area that i feel needs a major overhaul upgrade, in many different areas and stages of change..
As one can see the major RHW system is quite messy with its multiple MIS networks. And so my first step will be removal of the MIS nearest the highway. Than I will run the game for some game-years, and I follow this with a traffic capacity view image to see where I stand at that point with traffic conditions..
Next Day edit :
So here is the effect on traffic, that removing one of the MIS networks has had in the area.. It looks like the main traffic problem is this well over capacity RHW-2 that is circled in the pic -
My next stage of construction involves expanding the RHW 6s level 1 to a RHW 8s to see if i can remove ( or shorten) , at least one of the remaining mis and possibly both of them ..
So more later, on this extensive highway upgrade !
Yes of course there will be traffic view reports about the various modified interchanges. I am waiting in each case for the traffic situation to 'settle', which is only achieved after some game years have elapsed. Since I play my cities in a kind of round-robin fashion, this may take a while, but it will come in due time.
The subway is clearly having a benficial influence on the road traffic, by capturing some Sims that would otherwise crowd the roadways.
Other measures can be considered. For example, in your last picture above, the overpass just above the figure '2' is 3-lane wide, it could be changed to 4-lane wide (RHW-8S L1 or L2?). It is 4-lane wide just before the overpass (on the left of it) and after the overpass there is a ramp so that it could again be reduced to 3 lanes after that ramp?
Othe enhancements may be more difficult to implement. But this is what makes the game interesting, right?