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False, Justin. He works on a map and has an problem at the saving! But i don't now the answer. Hopefully help other user.
Greets

I think, it's because of a wrong road connection (the error message says all).
I once had the same problem, and solved it through checking the connections between the roads. This error message comes, if you try to put for example a 4 lane and a 2 or 3 lane road together. This doesn't work (the map editor connects the 2 roads, but you get this error message if you try to save). You should check your road connections, and correct the mistake. (so for the future: the best is to put only streets with the same amount of lanes together )

I hope this helps you and i hope u can understand what i tried to write.
I excuse for my bad English

Just workout a highway exit for one of the lanes into nothing, then it should work.