I literally just came back here after thinking about the copy function myself. That would be great, thanks!
A couple more I thought of..
4) Save the state of the map in whatever shape we left it in before we exited the game. That way I don't have to start from scratch when I come back. I just realized this after I came back to the game to find what I set on a particular level was gone.
5) Each map also should have 3 difficulty levels, and each one has more traffic than the last. I feel the amount of traffic being used in the current maps would be considered "expert" level. Maybe each level is a different time of day, which would vary the traffic load. Easy would be evening or overnight. Medium would be around noon, and expert level would be rush hour traffic in the early evening. This would give us more reasons to play the same maps over and over.
6) Leaderboards?
7) When a map fails, I would like some sort of notification as to why. I can only assume I let the lines of cars go off the map for too long, but it would be nice to know what I did wrong so I could correct it later.
8) Minor gripe, but when a car makes a turn, it's almost 90 degrees. On the "cross" map I tried to have two opposite turn lanes go at the same time (each going left), but they kept driving straight into each other because they were trying to go more 90 degrees than a 45 degree angle you would expect when turning.
Thanks again!!