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Hollowayj, Frank MeLvin M S<,CoE , Purdue University, June 1956o Road Roughness Measurements on Indiana Pavement s Major Professor? Harold L Q Michaelo The purpose of thi3 project was first, to develop and calibrate a Purdue relative road roughness indicator; second, to test and com= pare the riding qualities of certain pavement types currently in place on Indiana highways; third, to investigate certain factors that affect road roughness; and fourth, to suggest standards of rou^iness that are acceptable for new construction and standards for evaluating surface riding qualities of existing pavoncnts A "Relative Road Roughness Indicator" of the Bureau of Public Roads type, constructed by the Purdue University Central Machine Shop in cooperation with the Joint Highway Research Project, was used in making these tests All road roughness measurements were made in accordance with Bureau of Public Roads" recommended procedures. Road roughness measurements were made on 115 different pavement sections located throughout Indianao These pavement sections were divided into three main categjriess (1) new portland cement concrete pavement s? (2) older portland csmerft concrete pavements constructed on granular base courses, and (3) bituminous surface types on flexible

Road Roughness Measurements on Indiana Pavements