FreeGameDev

Some tracks are made in such a way that they are hard to, or sometimes even impossible, to play in reverse.
Adding a "not reversable" option in the editor would allow an editor to make tracks that can only be played in one direction.
In game, when a non-reversable track is selected, the reverse checkbox would be either greyed out or gone completely.

Shouldn't be a problem to do it.
By design all (of my) tracks are made so they are drivable in reversed too, but yes some extreme ones just can't be.

Heh so after a year, we have now that option.
On master (or future ver 2.3), there is a Game tab in Editor with some (a bit advanced) options for a track.
Gravity, wind, damage multiplier, tires, and 'deny reverse direction'.
Gravity and 'deny reverse direction' weren't present before, but the rest was, by editing scene.xml (which now won't be necessary for them).