Remarks on the Present System of Road Making: With Observations, Deduced from Practice and Experience, With a View to a Revision of the Existing Laws, and the Introduction of Improvement in the Method of Making, Repairing, and Preserving Roads, and Defending the Road Funds from Misapplication. Seventh Edition, Carefully Revised, With an Appendix, and Report from the Select Committee of the House of Commons, June 1823, with Extracts from the EvidenceMcAdam, John Loudon
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Remarks on the Present System of Road Making: With Observations, Deduced from Practice and Experience, With a View to a Revision of the Existing Laws, and the Introduction of Improvement in the Method of Making, Repairing, and Preserving Roads, and Defending the Road Funds from Misapplication. Seventh Edition, Carefully Revised, With an Appendix, and Report from the Select Committee of the House of Commons, June 1823, with Extracts from the Evidence
McAdam, John Loudon
Macadam roads; Roads -- Great Britain
In order to attain the advantage you allude to in the angular materials,
I take it for granted, it is your plan to have the larger pieces of
gravel well broken?—Certainly; but I mean further, that in digging the
gravel near London, and places where there are vast quantities of loam,
and that loam adhering to every particle of the gravel, however small, I
should recommend to leave the very small or fine part of the gravel in
the pits, and to make use of the larger part which can be broken, for
the double purpose of having the gravel laid on the road in an angular
shape, and that the operation of breaking it is the most effectual
operation for beating off the loam that adheres to the pieces of gravel.
There are other cases besides that of gravel, in which I should think it
unprofitable to lift a road. The road between Cirencester and Bath is
made of very soft stone, and is of so brittle a nature, that if it were
lifted it would rise in sand, and there would be nothing to lay down
again that would be useful. I should not recommend lifting of freestone
roads for the same reason, because it would go so much to sand that
there would be very little to lay down again. I will explain what I have
done to that road between Cirencester and Bath; I was obliged to lift a
little of the sides of the road in order to give it shape, but in the
centre of the road, we, what our men call, “shaved it;” it was before in
the state which the country people call “gridironed,” that is, it was in
long ridges with long hollows between, and we cut down the high part to
a level with the bottom of the furrows, and took the materials and
sifted them at the side of the read and returned what was useful to the
centre.
Can you state whether the plan adopted on this road has increased or
diminished the expense?—I think the expenses, by the last account, were
rather within the expenditure of the former year, even including the new
surveyor’s wages. They had been in the practice of allowing about 32_l._
a week to the two surveyors as the ordinary expenditure; I directed the
new surveyors not to exceed that sum upon any account whatever,
including their own wages: but formerly they paid that sum, and paid the
surveyor his wages at the end of the quarter or half-year in addition:
therefore I consider the sum expended upon the road is rather within the
former expenditure than otherwise, except with regard to two dangerous
slips which took place at Swainswick-hill, which I consider as perfectly
extra.
Public-domain text, read in full here on John Shaqi.
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