johnwill65
It scares me that you ask such a question. Why did you do the test pits if you are not confident in them?
Where would you do a soil boring compared to where you have already performed a test pit? Hopefully the people out performing the test pits had a plan on where to dig the test...
By placing more weight on the roadway additional settlement will occur. From your statement the roadway has been buried 3 times already.
Remove the unsuitable soil to a acceptable depth and replace with either rubber tires or lightwieght styrofoam and float your road over the unsuitable soils...
