[Ryz]

//enter derby

pawn Код:

new PositionsDerby = random(sizeof(DerbyPos));;
SetVehiclePos(playerid, DerbyPos[PositionsDerby][0], DerbyPos[PositionsDerby][1], DerbyPos[PositionsDerby][2]);

and use this to block if derby is full

pawn Код:

if ( PositionsDerby >= 14) return Yourfucnctionhere; // use your function sendclientmsg or anything

Change that 14 to yours