You can know after all. Its been a long time between drinks but I finally ckecked back with this Forum.
The crossing was one of the few things I have done that has actually worked well after 13 years. It took 2 ton cars easily and the occassional concrete truck. Over time some tyres did pop up - but I simply removed them and filled in the hole. Also as the base was not level or consistent some tyres would be pushed down and require more fill over the top. On average i would place a layer of gravel (about 75mm or 3 inches) over the top each year and that is the extent of the maintence - apart from mowing as the grass grew through the gravel.
In retrospect I would do some things differently. I used rather small gravel at about 20-25mm. This is fine for a top coating and for lighter vehicles but for a solid base you need much larger stuff - at leat 100mm or 4 inches. I am in the process of upgrading the road to morer safely take trucks 15-20ton. For this I am simply using a larger size gravel. It will never be strong enough for regular use of big trucks.
Take home messages:
Its a lot of work to bolt those tyres together!
Use gravel at least 75mm in size for a base.
The road will always be 4x4 only as wheel spin does cause holes.
Oh and for the record: Only one person was ever stuck. My neighbour drove his 2-wheel drive truck over the edge one day to avoid a floating log during a flood.
Hope people find this entertaining after all these years.
George
