The Garden Guide

Book: Observations on the Theory and Practice of Landscape Gardening, 1803
Chapter: Chapter VI. Of Fences

Underpasses beneath roads

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It often happens that a walk in a plantation or shrubbery is crossed by a road or driftway; this has been ingeniously obviated (I believe originally by Mr. Brown), by making one pass over the other, and where the situation requires such expense, a subterraneous passage may either be made under the carriage-road, as I have done at WELBECK, at GAYHURST, and at other places, or a foot-bridge may be carried over the road, as I have frequently advised: but a more simple expedient will often answer the purpose, which I shall describe with the help of the annexed sketch [fig. 70], representing the ground plan of the intersected roads. [Underpasses were used, by Frederick Law Olmsted, to cross the paths in Central Park, New York, and it is possible that the idea came from this passage in Loudon's edition of Repton's works - TT]