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Las Rico 109e (fix)

Actually the city behaves better if you leave only the outermost highway connections.

The OP was playing in easy mode and only that bit of highway gets stuck, in no despawning, hard mode the city gridlocks because of trams and cars never make it to the highways

Sadly, I'm afraid it doesn't work without the advanced AI in TMPE. Without it, it becomes unplayable for me.

I let it run for a little. Not super long, but long enough it should have flushed the pre-existing traffic. So yeah, that's kinda weird.

The highway behavior was what I was most interested in fixing, so I was hoping you had a vanilla fix for that. I don't normally run TMPE if I can help it.

Default highway behavior of the game is really broken. Activating "advanced vehicle AI" and "enable highway specific lane merging/splitting rules" within TMPE usually fixes most of that. and if not, you can always connect the lanes up using the lane connector.

Why they worked better without TMPE, I'm not quite sure actually. Maybe there because the cars already saved their route when I saved the city with TMPE on, and if turned of it would gradually go back to the old AI when new cars start their journey. But that's just guessing on my part, I don't actually know.

Another thing I did was set TMPE to stop regular traffic using the bus lanes. But sadly that also required changing the arrows so the regular lanes serve all the directions. It should help the flow of your buses better, this way.

Thank you so much for taking a look. Can I ask what else you did for the highway by the map edge? The lanes are behaving themselves, but I don't see any lane connectors or other management in that area. I even loaded the first time without TMPE and it was playing nice. I'm very curious why the highway lanes were functioning properly rather than one-laning, which was my primary concern.