1) Delayed reset. This is an option to have the martials pull you out of the gravel trap, with a delay and ONLY when the track is clear. If you have ever played GPL, there is a reset, but it waits until there are no cars near you before it works.
This method would not fix damage. You have to be able to drive to the pits to get fixed.
2) Quick reset option. This option allows you to reset when the track is clear. Damage is not fixed. You must drive to the pits to get fixed.
3) Arcade reset. This option resets you and fixes your car. The reset will still only work if the track is clear. (default for offline driving)
4) No reset option. No resets are allowed at all. If you can get your car out of the sand and drive it, you can continue.
Option 2 would be good for online racing in most cases, but option 3 would be OK too in some situations.
Option 1 would be the best for league racing in my opinion, but option 4 would be viable too.