I'm looking at a fresh layer of gravel for my 1000' driveway, but not sure what is the best type or size of gravel. The drive has a good base, the top has just compacted down to where it could use another layer of whiterock. I found a guy that is selling reclaimed gravel from an old railroad bed for a great price - semi load delivered for less than $150. He said it's around 22 tons. Thing is, I think that gravel might be too coarse for a regular driveway. I don't want anything larger than about 1 inch. Is there a standard grade or type or gravel that I can reference?