[Mauzen]

pawn Код:

stock IsVehicleOccupied(vehicleid)
{
    for (new i = 0; i < GetMaxPlayers(); i ++)
    {
        if (GetPlayerVehicleID(playerid) == vehicleid) return true;
    }
    return false;
}

Just written, so untested. This checks if a specific vehicle is occupied. You can use it in a loop through all vehicles to delete all unsused ones. Not the fastest method, but should be fine if you dont want to delete the vehicles every second