01005163

Component

https://doi.org/10.3141/1905-17

http://scholar.google.com...loul&publication_year=2005

The international roughness index (IRI) and the half-car roughness index (HRI) are the two commonly used roughness indices for pavement management, decision making, prioritization, budgeting, and planning. This work presents a new statistic, termed the full-car roughness index (FRI), for calculation of roughness from longitudinal pavement profiles. FRI is calculated from a single, equivalent profile that is a composite of four corner profiles based on both civil and mechanical engineering principles. More specifically, the full-car (four-wheel) model combines the rear and front suspension systems through an interdependent relation of motion with the longitudinal axle. To validate this model, the FRI values for different pavement sections are determined for sampling roughness measurements from several states and provinces. Then, the behavior of FRI is compared with that of IRI and HRI. The methodology of assessment uses a Monte Carlo simulation for calibration and validation of the index. Correlations derived from this sensitivity analysis on the basis of regression analysis arrive at a conversion chart to propose conversion values from these indices to FRIs. Overall, this paper suggests that the mechanical response of the proposed full-car model is more representative of the characteristics of a real vehicle than the response of a quarter- or half-car model. The results also indicate that FRI is less sensitive to the governing factors that account for the quarter-car simulation and thus provides an index that is unique, insightful, and more effective in the characterization of ride quality.

01005160

English

pp 148-156

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093775

Print

Figures (7) ; References (9) ; Tables (2)

Calibration; Measurement; Monte Carlo method; Pavements; Regression analysis; Ride quality; Roughness; Simulation; Validation

International Roughness Index

Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Oct 4 2005 10:06AM

• Accelerated Pavement Rehabilitation and Reconstruction with Long-Life Asphalt Concrete on High-Traffic Urban Highways
• Application of Reliability Concept in Concrete Pavement Rehabilitation Decision Making
• Asphalt Pavement Rehabilitation Treatment: Analysis of 20 Years of Performance
• Assessment of Pavement Layer Condition with Use of Multiload-Level Falling Weight Deflectometer Deflections
• Falling Weight Deflectometer Correlation
• Fast Nondestructive Field Test Method to Determine Stiffness of Subsurface Layer in Thin Surface Hot-Mix Asphalt Pavement
• History and Development of U.S. Procedures for Falling Weight Deflectometer Calibration
• Identifying Friction Variations with the Standard Smooth Tire for Network Pavement Inventory Friction Testing
• Implementation of Cold In-Place Recycling with Expanded Asphalt Technology in Canada
• Implementation of Reliability-Based Backcalculation Analysis
• Interpretation of Transverse Profiles to Determine the Source of Rutting Within an Asphalt Pavement System
• Methodology for Detection of Defect Locations in Pavement Profile
• Modeling Hydroplaning and Effects of Pavement Microtexture
• Monitoring Pavement Changes in a Rehabilitation Project with Continuous Rolling Dynamic Deflectometer Profiles
• Seed Modulus Generation Algorithm for Backcalculation of Flexible Pavement Moduli
• Simple Model for Pavement Damage
• Wisconsin Experiences with Reflective Crack Relief Projects