YES, I'm adding vote to this reuest and adding few words of my suggestion.
As in real race, in the Pit Box stop, there if car is stopped, one of the team man put the STOP table (Lollipop) on the engine bonnet. It can be fix painted passive table, or electronical type with red, yellow, green lights. Whether electronical type or passive table, leave this decission on the developers.
Then if pit service going to the end of car repair, tyre changes, refueling, then table (Lollipop) will change to yellow and if all is done, then change it to green or GO and car can go back on the track (race). It make possibilities to false start from PIT, but will be penalized, something as false race start. But it make more realistic race feeling. Can be created this in LFS?