Jorge Prozzi, (512) 232-3488, University of Texas, Austin
Dock Burke, Texas A&M Transportation Institute
Dry weather, Highway safety, Macrotexture, Microtexture, Pavement performance, Skid resistance, Texture, Weather conditions
The skid resistance of the surface of the highway is controlled by its micro-texture and macro-texture. However, it is not clear under which conditions the contributions of micro- and macro-textures are dominant and what specific frequencies are important. In this study, we will study the contribution of both surface properties to skid resistance under dry and wet conditions and under different speeds. The study will aim at quantifying their effects on skid and to develop recommendations to increase surface skid and, therefore, to improve highway safety and reduce the number of total highway accidents. During this study we will address two primary objectives: 1) we will define a methodology for characterizing micro- and macro-texture from 3D scan of pavement surface; and 2) we will model skid resistance assessing separate effect of micro and macro-texture. The first objective will be addressed by collecting very high-definition image data on pavement materials and pavement surfaces. This information will be analyzed by Fourier Transform (or other equivalent methodology) to develop the model that will quantify the effect of micro- and macro-texture on skid resistance and, therefore, on highway safety.