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I have been working with many road & bridge contractors for over 30 years in the Civil Engineering Design & Inspection side of construction.
I would have guessed you worked for a concrete company or a wire mesh company based on your recommendation of 6 inches thick (8 inches by the road) and 2 layers of mesh. The recommended thickness on residential driveways is 4 inches. If your planning on driving heavy equipment on them, maybe a little thicker.
Nope, I don’t work for a concrete or mesh supplier, nor have any financial interest in any of those companies, just like seeing quality work.
I’ve seen many a 4″ Driveway Crack, No Cracks in the 5″ or thicker. A 4″ thickness may work as long as you make sure you get thicker edges and at the street and make sure your reinforcing is up in the concrete, not laying flattened on the base. Adding extra Mesh is cheap compared to relacing or having ugly cracks. I’ve. seen maany a lazy delivery or garbage truck use a residential driveway as a turnaround and watch them crack?
The Entry apron off the street should match the curb thickness and then taper to your running thickness.
See Mn/DOT’s Standard Detail: Mn/DOT Std. Driveway & Sidewalk Detail
With Asphalt you have maintenance every few years and again with Asphalt, Thicker is better and get it compacted properly on top of a good aggregate base. Going cheap/low bid will usually cost you more in the long run.
If you go with Asphalt, make sure you have a 1 1/2% cross slope or grade. This will benefit you in keeping it dry and after years of service when you get tire depressions or rutting, there should still be enough slope to drain without getting little bird baths. These area will eventually weaken the asphalt as the water seeps through and then in winter you’ll get frost heaving and cracks.
Good Luck.
PS: While going to the expense, suggest to the F.W. about adding a Stain in the mix to have a nice colored concrete. It will make yours driveway stand out from the crowd when you go to sell and does not cost much extra.