Analysis of surface texture using photogrammetry

Abstract

The skid resistance of the road surface is extremely important, especially from the point of view of the safety of moving vehicles. It is very important to strive for accurate, fast, and objective evaluation within a pavement management system. The current methods of obtaining the friction coefficient of the road, are to some extent influenced by testing conditions, which are difficult to eliminate or control at a constant level. Therefore, there is an effort to obtain the friction value based on non-contact measurement of the road surface structure. The main goal of the article is to verify the possibility of using photogrammetry to analyze the morphology of the road surface and its suitability for calculating surface texture parameters. Validation of the accuracy and applicability of the results was performed using the device Static Road Scanner, which has been shown to be reliable in previous research, by comparing standard texture parameters measured on reference surfaces with known characteristics. The reference surfaces consisted of sandpapers with a wide range of grain sizes. Samples of aggregates with different microtexture and macrotexture were also used to compare the methods. By comparing the texture parameters obtained by both methods, the assumption of the possibility of using photogrammetry to record the 3D surface of the road was confirmed, with the promise of further friction prediction based on non-contact surface measurements.