Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ CALIBRATION OF RESPONSE-TYPE ROAD ROUGHNESS MEASURING SYSTEMS https://trid.trb.org/View/165815 Thu, 21 May 1981 00:00:00 GMT https://trid.trb.org/View/165815 THE RATING AND MEASURING OF ROAD ROUGHNESS https://trid.trb.org/View/65028 Wed, 11 May 1977 00:00:00 GMT https://trid.trb.org/View/65028 RATING AND MEASUREMENT OF ROAD ROUGHNESS https://trid.trb.org/View/42988 Wed, 13 Apr 1977 00:00:00 GMT https://trid.trb.org/View/42988 THE PCA METER, AN INSTRUMENT FOR SURVEYING THE SERVICEABILITY OF ROADS, APPLIED IN SWEDEN https://trid.trb.org/View/27961 Wed, 07 Apr 1976 00:00:00 GMT https://trid.trb.org/View/27961 A CORRELATION OF VARIOUS SMOOTHNESS MEASURING SYSTEMS FOR ASPHALTIC CONCRETE SURFACES https://trid.trb.org/View/24154 Tue, 15 Jul 1975 00:00:00 GMT https://trid.trb.org/View/24154 THE PCA METER, AN INSTRUMENT FOR SURVEYING THE SERVICEABILITY OF ROADS https://trid.trb.org/View/136979 Tue, 11 Feb 1975 00:00:00 GMT https://trid.trb.org/View/136979 A FRESH LOOK AT THE INTERPRETATION OF PAVEMENT SERVICEABILITY AND AN EXPERIMENT TO MEASURE THE RIDING QUALITY OF ROADS IN SOUTH AFRICA https://trid.trb.org/View/138803 Tue, 22 Oct 1974 00:00:00 GMT https://trid.trb.org/View/138803