A 5-YEAR REPORT ON EVALUATION OF PAVEMENT SERVICEABILITY WITH SEVERAL ROAD METERS
THE PAPER REPORTS AN EVALUATION OF RESULTS OF PAVEMENT SERVICEABILITY TESTS MADE WITH THE PCA ROAD METER AND WITH MODIFICATIONS OF THE ORIGINAL ROAD METER DEVELOPED BY SEVERAL STATES AND PROVINCES. RESULTS OF CALIBRATIONS WITH SERVICEABILITY RATINGS OR SERVICEABILITY INDEXES FROM 8 SOURCES ARE SHOWN. REPEATABILITY TESTS ARE REPORTED FROM 7 SOURCES, ALONG WITH TESTS BY THE ORIGINAL ROAD METER OVER THE SAME SITE THROUGHOUT A 5-YEAR PERIOD. THE ROAD METER AND ITS MODIFICATIONS RANK WITH THE AASHO PROFILOMETER IN ABILITY TO RELATE WITH SERVICEABILITY RATINGS. VARIATIONS IN MEASURED ROUGHNESS RESULTING FROM CHANGES IN WIND VELOCITY, AIR TEMPERATURE, AUTOMOBILE SPEED, MECHANICAL FACTORS WITHIN ROAD METERS AND TEST AUTOMOBILES, AND SEASONAL FLUCTUATIONS CAUSED BY FROST ACTION ARE REPORTED AND DISCUSSED. EFFECTS OF WIND VELOCITY AND DIRECTION, AS RELATED TO DIRECTION OF TEST CAR TRAVEL, AND AIR TEMPERATURE DESERVE FURTHER FIELD OBSERVATION. SEASONAL FLUCTUATIONS DUE TO FROST HAVE A DISTINCT EFFECT, AND THE MAGNITUDE INDICATES THAT SERVICEABILITY MEASUREMENTS TO BE USED IN EXTENDED STUDIES OF PAVEMENT BEHAVIOR IN CONTUNCTION WITH TRAFFIC LOADING SHOULD BE MADE DURING A LIMITED PERIOD BETWEEN FULL RECOVERY (AS LATE AS JULY OR AUGUST) AND THE ONSET OF THE NEXT WINTER. THE SIMPLE DIGITAL COUNTING SYSTEM AND UNIQUE COMPUTING METHOD ENABLE THE PCA ROAD METER TO PRODUCE A STATISTIC CORRESPONDING TO ROUGHNESS POWER SPECTRUM. DATA FROM 2 NORTH CENTRAL STATES ARE USED TO ILLUSTRATE THE USEFULNESS OF THIS ATTRIBUTE IN ANALYZING SERVICEABILITY INDEXES RESULTING FROM VARIOUS TREATMENTS AND CONSTRUCTION METHODS. /AUTHOR/
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309018439
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Supplemental Notes:
- pp 80-91, 5 FIG, 9 TAB, 16 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Brokaw, M P
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Conference:
- Western Summer Meeting
- Location: Sacremento California, United States
- Date: 1970-8-17 to 1970-8-19
- Publication Date: 1971
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 80-91
- Monograph Title: Improving Pavement and Bridge Deck Performance
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Serial:
- Highway Research Board Special Report
- Issue Number: 116
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Automobiles; Measurement; Pavements; Profilometers; Roughness; Seasons; Serviceability; Speed; Temperature; Velocity; Wind
- Uncontrolled Terms: Seasonal variations; Serviceability Index
- Old TRIS Terms: Wind velocity
- Subject Areas: Design; Highways; Pavements;
Filing Info
- Accession Number: 00207254
- Record Type: Publication
- ISBN: 0309018439
- Files: TRIS, TRB, ATRI
- Created Date: Jun 29 1971 12:00AM