As it appears i was nearing the map limitation and cannot put all the racetrack ideas into one map.

How i will do it:
Create apart maps based on the type of racetrack (such as this map is only based on displacements)

So i decided to do that for this map , but i am having trouble about the other maps.
I have no idea how i have to order the maps by type , maybe if someone can help me out?

Here's already an example:
Racetrack map based on displacements (this one , gm_revraces)
Racetrack map based on concrete ground (gm_revraces2 or gm_revracec_road?)
Racetrack map miscellaneous (gm_revraces3 or gm_revraces_misc?)