Macneill's road indicator
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Macneill's Road Indicator was a dynamometer for ascertaining the force necessary to draw a carriage over different kind of roads and pavements. It was developed by John Benjamin Macneill in the late 1820s.[1]
Macneill's road indicator was completed according to drawings laid before and authorised by the Parliamentary Commissioners in 1829. It was first used on the road between London and Shrewsbury. A description of and the method of using it was included the Sevent report of the Commissioners(1830).[2]