What type of gravel should I use to top a sand driveway?
I would use crushed quarry or shale but not crushed river rock. Quarry and shale lock together quite well but crushed river rock moves around.
I would want at least 4” (we put 6” in our horse stalls) and compact it. With rubber mats over the top, it is good and solid even with our warlander (a draft / Andalusian cross 17-2 hands) a big horse.