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Marlin Bay

I always get rid of those vanilla interchanges as quickly as I can when playing. So I could be guilty of not actually seeing a problem. It was bound to happen on one of my maps...I make a lot of them. But I do play everyone of them just to be sure. But I am not perfect so something like that may have got by me. Like I said I will do a good check in the morning. Again thank you for bringing it to my attention.

I will check that. I have not found that problem yet since I made it as traffic has flowed perfectly in my game. But there is a possibility that I corrected something in my game and just did not recognize there was a problem and just figured I made a mistake putting in a new interchange. I will investigate it tomorrow and if you are right I will immediately do a correction. Thank you for letting me know.

some of the highways are flowing in the opposite direction at some places and it breaks the highway system

There are no broken highways on the map. Something happened when you loaded it or a mistake on your part. I have been playing this map since I made it and there are no broken roads. It works fine.

the map's highways are broken
please test your maps before posting them

banana island

Keep up the good work!