Comparison of Different Methods of Measuring Pavement Conditions : Technical Paper

Yoder, Eldon J; Milhous, Robert T.

doi:10.5703/1288284313665

Cited by 6 publications

(5 citation statements)

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“…One of the components required for calculation of PSI is the slope variance of the road profile. Slope variance (SV) is a statistical term that indicates the variation of slope of a pavement from the mean slope value (11). It is computed from the longitudinal profile by use of the following equation:…”

Section: Slope Variancementioning

confidence: 99%

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Performance Prediction of Louisiana Accelerated Loading Facility Test Sections

Djakfar¹,

Roberts

2000

Transportation Research Record: Journal of the Transportation R

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Using the accelerated loading facility (ALF), the Louisiana Transportation Research Center recently conducted an accelerated pavement test of nine test sections that consisted of the same asphalt wearing course but had different types and thicknesses of crushed stone and soil cement bases and subbases. One of the aims of the project was to compare observed field performance with that predicted with use of the VESYS 3A-M mechanistic prediction model, which predicts the development of rutting, cracking, and roughness, along with serviceability [present serviceability index (PSI)] over time. It was found that VESYS provided a reasonable prediction of observed rutting and PSI—albeit an underestimation—but a poor estimate of surface cracking. This was probably related to the fact that the observed cracking was due to shrinkage of the soil cement rather than fatigue cracking under the load, and also to the fact that VESYS is generally used to model unbound granular materials that have a modulus no greater than 690 MPa (100 ksi). The modulus of soil cement material tested by ALF was 105 MPa (150 ksi) and its behavior under load would be different from that of an unbound granular material. More research is needed into the behavior of soil cement bases, their influence on the cracking of asphalt surfacings, and the most appropriate input into VESYS to model this behavior.

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Section: Slope Variancementioning

confidence: 99%

“…PSI was developed at the AASHO road test as a way of characterizing the riding quality of the road (11). At the road test, a panel of 15 engineers drove over selected pavements and rated the pavements using a scale of 0 to 5.…”

Section: Psimentioning

confidence: 99%

Performance Prediction of Louisiana Accelerated Loading Facility Test Sections

Djakfar¹,

Roberts

2000

Transportation Research Record: Journal of the Transportation R

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“…The scale has been divided into five major divisions, and each division has been assigned a qualitative description as follows: 0.0 to 1.0 -"Very Poor"; 1.0 to 2.0 -"Poor"; 2.0 to 3.0 -"Fair"; 3.0 to 4.0 -"Good"; and 4.0 to 5.0 -"Very Good". (7,15,19) In determining the present serviceability only the condition of the pavement was considered in these three studies.…”

Section: Measurement Of Serviceabilitymentioning

confidence: 99%

“…The texture of the pavement es measured by the Texas and South Dakota texture meters was also found to have some effect for all pavement types. (19) Predict ing .serviceability by the &ASK0 t -Equations…”

Section: Source;mentioning

confidence: 99%

A Method for Comparing Alternate Pavement Designs

Ulbricht¹

1967

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The purpose of this research was to develop a method for comparing a set of preselected pavement designs for a proposed section of state highway in Indiana. This comparison is based on consideration of both economic and performance requirements. The major portion of this study was devoted to obtaining a measure of the total performance of highway pavements with known design characteristics and traffic loadings. The AA3H0 Performance Equations determined in 1961 at Ottawa, Illinois were used to predict the present serviceability trends with time of 160 study pavement sections. A serviceability trend is a measure of the performance of a pavement. The AASHO equations were found to estimate the present serviceability of Indiana highways within acceptable limits of precision. However, additional precision was obtained by modifying these equations to reflect the lower initial serviceability levels of Indiana rigid, flexible, and overlay-pavements compared to the AASPiO Road Test pavements. The modification was accomplished by regression analyses between the predicted ix and measured present serviceabilities of the study sections. The regression equations have been termed the Indiana rigid, flexible, and overlay serviceability equations. From the Indiana equations, tables were compiled listing the anticipated performance of various pavement designs under a wide range of traffic loadings. The tables Included in this report permit determining the performance-to-cost ratio of each of the pavement designs to be compared. This ratio can be used to select the proper pavement design for given traffic and environmental conditions. When loadometer data are not available, the use of the AASHO and Indiana serviceability equations is facilitated by the technique developed in this study for approximating the number of equivalent 18-kip single axle load applications a pavement section has received. This estimate is made on the basis of the number of trucks traveling over the highway.

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“…In 1964 Yoder and Milhouse (11) reported on a research project sponsored by the NCHRP in which various methods of measuring pavement condition were studied and use of panel ratings for calibration of roughness devices was also conducted.…”

Section: Introductionmentioning

confidence: 99%

Development of a System for the Evaluation of Pavements in Indiana : Summary Report

Yoder¹

1981

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Comparison of Different Methods of Measuring Pavement Conditions : Technical Paper

Cited by 6 publications

References 1 publication

Performance Prediction of Louisiana Accelerated Loading Facility Test Sections

Performance Prediction of Louisiana Accelerated Loading Facility Test Sections

A Method for Comparing Alternate Pavement Designs

Development of a System for the Evaluation of Pavements in Indiana : Summary Report

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