Gravel driveway advice

[DC5]

Hello all, welcome have a 150sqm driveway which is currently compacted type 1.

All our other paths are riverbed type gravel which I would like to lay on the drive it is also fairly cost effective.

I have been looking at the concertina type gravel stabilisation which is a bit cheaper than gravel trays.

What is the ideal depths I was thinking about 50mm trays or pull out grid then about 30 / 40mm loose on top.

Any input or experiences would be greatly appreciated.

many thanks, Dave 

[MPx]

No sure how relevant as I think it will be material dependent, but FWIW:

 

I don't think you'll want 30-40mm on top.  We had a long circular drive and parking areas all on slopes.  I used 50mm plastic gravel grid trays.  Finish material was 20mm black basalt that I shipped in in 16 ton loads.  It worked best with the absolute minimum (ie just one stone where possible) above the trays - just enough so that the trays disappeared from sight.  Any more and grip on the slopes was lost and the spinning wheels could break up the partitions in the trays beneath.  But with minimal coverage, much less likely to slip (except the courier company delivery vans obviously as they have their max launch control permanently engaged).  The basalt was ideal being very hard and grippy.  Where we are now (while flat) has a light cotswold stone gravel that's really not suitable - over time (needs work annually) it crushes to powder.  Don't know where your proposed riverbed gravel fits on the hardness spectrum.

Edited 2 hours ago by MPx