After playing the first round, there were a few things I want to point out, some may be really not so good, some maybe personal opinion.
Thats why I will sort it after importance.
VERY IMPORTANT:
Terraforming limit is needed in any way (the best way I know is a limit of 50/100 tiles with a slow cooldown)
-I know there are rules, but at night, on a extreme long server, they will be ignored, and the whole map will be terraformed - which is very boring...
NO 90° turns for TRAINS!
Personal Opinion
Train/Car/Plane limit was okay,
-planes should stay at 50
-trains can be reduced a bit, 1000 is to much (800?)
-cars was ok
-Train length I personal liked 7 tiles trains, but I know for an extreme server the most want longer, but my suggestion is, dont make it to big.
Or if it is made big, there should be some difficulty in the track design, like if the train has to take 2 turns at the same time, it slows down.
Minor things
-a little less slow down on slopes, but just a little.