My town currently has 4 highway on/off ramps. one on the far right (where the yellow and green lines start), one in the middle right above my industrial area, one in the middle left, between my farms/logging industry, and a 4th one off screen to the further left that goes to a seaport.
I would assume that traffic would follow the yellow line, using the offramps near their destinations.
instead, ALL the traffic coming into my city, is coming in on the far right and weaving through my surface streets (a 4 lane road, not highway, ring road, and 2 lane connector roads), causing massive traffic headaches and even bigger backups as they try to follow the green line to get to the far left through my city.
Why are my Cims dumb and bombing through the middle of my city, instead of taking the highway?
and another topic… this torrential crush of vehicles coming in off that one far right offramp regularly causes huge backups for 4+ chunks on the right highway. I have lane mathmatics. I have a very long runup where they have plenty of time to get over. I still get idiot Cims taking the furthest lane just to get ahead of the crush before stopping and trying to merge in right before the offramp.
I miss TM:PE traffic lines.
Are there any cars taking the yellow route? I would check for any silly mistakes, like an offramp that is turned the wrong way, or disallowing left turns where that would be needed to follow the yellow route.
Is any part of the green route a 4 lane highway? That would incentivise your cims to take the green route. Maybe the tunnel?
If none of that is the issue, I would make the green route tunnel end up elsewhere, so that route becomes less attractive. For example, let it end at the tip of the southern peninsula, connecting up to your ring road somewhere around the S shape.
my original offramp in the middle left used to get crushed the same way, then I built a new offramp for my industrial area, to get my industrial stuff out of the middle of the city as much as I could… then all the traffic came off on the industrial ramp, until I made the offramp on the far right, for future expansion, where all the traffic crushes off that one now, instead
Nope, all 4 lane regular road