ROAD CORRUGATIONS
highways board research
Conclusions resulting from research into fhe problems of corrugations on road surfaces were given in a lecture by Air A. Tyndall, engineer to the Alain Highways Board, before the Technological Philosophical Society.
Facts adduced from the research, he said, were as follows: The spacing of corrugations had been found to range from 20 to. 37
inches. • Spacing was related to the speed of vehicles, e.g., a certain car travelling at 25 miles 'an hour produced corrugation 21.1-lin. apart. • while th'o - same ear travelling on the same road .at .40 miles an horn* produced them at. intervals of 20.32 in. ■
High pressure tyres were much more conductive to their formation than balloon tyres. Certain tvpe of shock absorbers had a deterrent effect on their formation.
'Dry weather encouraged their development. - . .. J; “Tho increased use of balloon tyres in recent years should have theoretically retarded formation of corrugations,” said Mr'Tyndall, “but the effect* has apparently been much more than balanced by increased speeds .of both; cars and lorries and by the ns© of {high pressure tyres on heavier vehicles. The difficulties of tho road engineer can be realised [when it is possible for corrugations to bo developed by the passing of 50 vehicles over a gravel road at -10 miles an hour. Marty of our unsqaled highways carry' up-to 400 motor vehicles per day.” •
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https://paperspast.natlib.govt.nz/newspapers/GIST19330525.2.17
Bibliographic details
Gisborne Times, Volume LXXIII, Issue 11953, 25 May 1933, Page 3
Word Count
227ROAD CORRUGATIONS Gisborne Times, Volume LXXIII, Issue 11953, 25 May 1933, Page 3
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