I'm new to the driveway game and am working on just our second one. Done many patios and walks and never tamped concrete sand after screeding. With a driveway does anyone tamp after screeding sand and then top up with a second layer after. I'm guessing it can help to reduce the amount of settling the driveway may do under vehicle pressure but I'm not sure I understand the procedure that is taken to do this. Can anyone elaborate??