I can only tell you what we do here where we can have 30"s of frost in the ground and every thing moves then.

We strip all top soil to get to the sub soil,
Then run in 4" medium recycled crushed concrete to the height of where the top soil was.
Then some A gravel on top of the 4" about 6"s of it. Then back berm the drive with the top soil you scraped back to get a nice slop away from the drive to get water away.

We find up here the sharp edge gravel is what you want. The sharp edges with bind and bridge together very tight. Round rock and stone with stay loose no mater how much clay you add to it.

Cheers Don

Last edited by DonoBBD; 05/13/15 09:57 AM.
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7/8th of an acre, Perch only pond, Ontario, Canada.