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
History
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
Only a small space of road should be lifted at once; five men in a gang
should be set to lift it _all across_: two men should continue to pick
up and rake off the large stones and to form the road for receiving the
broken stone, the other three should break stones—the broken stone to be
laid on as soon as the piece of road is prepared to receive it, and then
break up another piece; two or three yards at one lift is enough.
The proportioning the work among the five men must of course be
regulated by the nature of the road; when there are many very large
stones, the three breakers may not be able to keep pace with the two men
employed in lifting and forming, and when there are few large stones the
contrary may be the case; of all this the Surveyor must judge and
direct.
But while it is recommended to lift and relay roads which have been made
with large stone, or with large stone mixed with clay, chalk or other
mischievous materials, there are many cases in which it would be highly
unprofitable to lift and relay a road, even if the materials should have
been originally too large.
The road between Cirencester and Bath is made of stone too large in
size, but it is of so friable a nature that in lifting it becomes sand;
in this case I recommended cutting down the high places, keeping the
surface smooth and gradually wearing out the materials now in the road,
and then replacing them with some stone of a better quality properly
prepared.
In like manner a part of the road in the Bath district is made of
freestone which it would be unprofitable to lift.
At Egham in Surrey, it was necessary to remove the whole road to
separate the small portion of valuable materials from the mass of soft
matter of which it was principally composed which was removed at
considerable expence, before a road could be again made upon the site.
Other cases of several kinds have occurred where a different method must
be adopted, but which it is impossible to specify, and must be met by
the practical skill of the Officer whose duty it may be to superintend
the repair of a road, and who must constantly recur to general
principles. These principles are uniform, however much circumstances may
differ, and they must form the guide by which his judgment must be
always directed.
When additional stone is wanted on a road that has consolidated by use,
the old hardened surface of the road is to be loosened with a pick, in
order to make the fresh materials unite with the old.
Carriages, whatever be the construction of their wheels, will make ruts
in a new-made road until it consolidates, however well the materials may
be prepared, or however judiciously applied; therefore a careful person
must attend for some time after the road is opened for use, to rake in
the track made by wheels.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account