Car Falling through the track in assetto Corsa

[Cool Studios]

I have just completed a test track, quite a simple track to test it. The track loads well in Assetto Corsa with no problems, however when I drive onto the ROAD the car falls through the map.
After numerous attempts at editing the track in RTB the same thing happened. I then tried editing the FBX file in 3DS Max, because I have a suspicion that the problem is the naming of the road objects. I tried renaming the original 1TRACK_0000_SUB0 to jut 1ROAD as stated in th AC course builing guide but this did not fix the issue.
I used the Assetto Corsa Empty Track template too from Support folder but still no success.
Will you please supply an answer to this issue.

Thanks

PS Is there any chance of adding an UNDO and REDO feature for future updates it is frustrating to try to fix a mistake

[Bernd H.]

The Naming is not the Problem, i can drive on the roads in AC without changing anything.
did you try to make another track to see if the problem remains?

I have made a lots of track for Assetto Corsa, and have never such a problem, so i don´t think its a general problem from RTB.

[M@dBrain]

https://youtu.be/TSg191kcHWM
my solution,,,

[lux3y]

don't make your track sections longer then 1KM , this will fix your problem , make 1KM sections , and join them together , u will now no longer fall thru ur map. Enjoy