Impact of Traffic Volume on Pavement Macrotexture and Skid Resistance Long-Term Performance

Abstract

Pavement skid resistance is influenced by both pavement macrotexture and microtexture, with the two components providing the skid resistance properties required to assist in ensuring road safety. In addition to these factors the cumulative traffic along a pavement is a known determinant factor influencing pavement surface characteristics leading to deterioration. However, previous research efforts in this area have been evaluated based on laboratory experiments that have not proven to be easily extrapolated to represent field conditions. With this in mind, the present study aims to investigate and comprehend the long-term effect of cumulative traffic on both skid resistance and macrotexture evolution based on actual field measurements. The ultimate research goal is to develop a practical approach for analysis and interpretation of in-situ performance characteristics that could be utilized by road agencies in evaluating long-term skid resistance performance. For the investigation, an 11-year field dataset consisting of three categories of pavement sections defined by their traffic volume/characteristics and geometric design was analyzed. The analysis results showed that skid resistance and macrotexture can be separated into two defined zones during their evolution, which are determinant for the remainder of the pavement service-life. In addition, the varying characteristics of the three investigated cases were presented and a sensitivity analysis performed. Overall, knowledge gained from understanding the long-term field pavement performance can provide valuable information to road agencies for on-time pavement maintenance actions that can help ensure pavement sustainability.