Dr. Mcfarmsworth Hugglesbottom

Thanks soltangris and skimbo, that was helpful, but the problem seemed to have solved itself magically (the purple layer came back.... weird). Anyway I decided to build another expressway link for now, the price tag on the highway didn't seem worth it just yet, I think I'll build one next.

Hey guys, I suppose this question is only relevant to the post on a tangent but you guys sound helpful, so I'll ask anyway. I have a city of 210000 and 150k income per tick, and I might lose all of it unless I get some fresh freight. I cannot for the life of me figure out why the game will not let me build another road connection to fix the problem ( the purple area is no longer there). I only have one connection so far (an expressway) thus I suspect some sort of limit on freight is not the problem. If anyone could enlighten me as to what is going on/ what I should do I would be very grateful. PS. nezroy your post was very informative, thanks.