CORRELATION OF ROAD ROUGHNESS MEASUREMENTS OBTAINED WITH THE 1962 CHEVROLET IMPALA AND WITH THE STANDARD QUARTER-CAR MODEL. FINAL REPORT
This report discusses an investigation of the relations between different approaches to the measurement of road roughness index values. The two principal objectives of this study were to (1) develop a correlation formula between the old 1962 chevrolet impala quarter-car model and the new golden car simulation models for mays meter calibration, in order to bridge the differences between these two scales of road roughness index; (2) calibrate the Pennsylvania Department of Transport's mays meters, using the new ASTM standard quarter-car model. A linear regression equation was developed to achieve the first objective; this equation will allow for maintaining continuity in road roughness measurements with the new ASTM standard procedure for evaluating road roughness. It should be emphasised that, even though the correlation formula is statistically meaningful, it does not adequately explain the actual relationship between the two quarter-car models and should be applied with great care. Calibration equations were developed for four mays meters operating at 25 mph (40 kmph) and 40 mph (64 kmph). Additional statistical analysis of the calibration procedure was performed. The results indicate that the data base for the calibration of mays meters can be reduced greatly.
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Corporate Authors:
INSTITUTE
University Park, PA United States -
Authors:
- KULAKOWSKI, B T
- Publication Date: 1985-7
Language
- English
Media Info
- Pagination: 32 p.
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Serial:
- PTI REPORT
- Issue Number: 8515
- Publisher: INSTITUTE
Subject/Index Terms
- TRT Terms: Calibration; Mathematical models; Measurement; Regression analysis; Smoothness; Surfacing
- Geographic Terms: United States
- Subject Areas: Data and Information Technology;
Filing Info
- Accession Number: 00487726
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Files: ITRD, TRIS
- Created Date: Sep 30 1989 12:00AM