26/03/2018 · add crushed, pea, decomposed granite, other(?) to our existing driveway. I've not done such before and hope youthful, "measure once cut 16x's" is a headknocker of the past. Spring is peaking and I want to get this rolling before mud becomes a heavy factor. Our driveway has been decent and for the most part, we simply want to improve the surface.