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
Do you consider that it would be advisable to pave the whole of the
roads, or that the paving of the centre or sides, as has been
recommended by some witnesses, would be sufficient?—I apprehend that the
paving a proper width in the centre would be quite sufficient, gravel
might be proper enough for the sides, upon the same principle that we,
in all new roads which are constructed, make use of metalling, or broken
stones on the middle part of the road, for about from sixteen to
eighteen or twenty feet in breadth, and leave the sides gravelled and
kept dry; this, in general, forms a very perfect road.
Is there any principle which you would think proper to recommend in
regard to the shape of the stones to be used in paving roads?—I am of
opinion that the general shape of the stones at present used for paving,
and the modes of distributing them are very imperfect, the lower part of
the stones being of a triangular wedge-like shape, which, instead of
enabling them to resist the weights which come upon them; easily
penetrate into the substratum; the stones are also broken of an unequal
size. The remedies for these defects are obvious, they should be as
nearly as possible of a cubical form, its lower bed having an equal
surface with its upper face; they should be selected as nearly as
possible of an equal size, and they should never be of great length on
the face.
In quarrying and preparing the stones would there be any additional
expense in forming them into the cubical shape now recommended?—There
would certainly be an additional expense in the preparation, because
there would be more work required in the dressing, and many stones must
be rejected which are now used; but I think the additional expense would
be very well bestowed.
Are you of opinion that great injury is done to turnpike roads by the
heavy weights carried in waggons upon them?—I am.
Are you of opinion that any breadth of wheels for those waggons will
justify the present exemption from tolls?—It certainly ought not.
In what manner would you recommend that the tolls should be apportioned
to the weights carried by waggons on those roads?—I am of opinion that
the most advisable mode would be to apportion the tolls to the weight
carried on each wheel, without reference to the breadth, provided it is
not allowed to be less than four inches.
For the purpose of assessing the tolls in this instance would it not be
necessary that the waggon should be weighed at every turnpike
gate?—There ought to be a power to do it, but there might be a check by
means of toll tickets, similar to what is done upon navigable canals.
Public-domain text, read in full here on John Shaqi.
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