41 Transactions of the VŠB – Technical University of Ostrava, Mechanical Series No. 2, 2018, vol. LXIV article No. 2049 Dušan NEMEC * , Rastislav PIRNÍK ** , Marián HRUBOŠ *** EVALUATION OF THE ROAD SURFACE QUALITY INSIDE THE ROAD TUNNEL HODNOTENIE KVALITY POVRCHU VOZOVKY V CESTNOM TUNELY Abstract The paper discusses a method for quantitative evaluation of the road surface based on processing of the cloud of 3D points. The points are measured by high-speed laser scanner mounted on the vehicle. Such approach allows to scan the road surface without the need to stop the traffic inside the tunnel. The obtained data are processed in offline mode. The processing algorithm evaluates the structure (texture) of the surface, which has the direct impact on the safety of the road transport. Abstrakt Článok sa zaoberá metódou kvalitatívneho hodnotenia povrchu vozovky, založenou na spracovaní mračna 3D bodov. Body sú získané meraním pomocou vysokorýchlostného laserového skenera namontovaného priamo na vozidle. Tento prístup umožňuje skenovanie povrchu vozovky bez nutnosti zastaviť premávku v tuneli. Získané dáta sú spracovávané off-line. Algoritmus spracovania dát hodnotí štruktúru (textúru) povrchu vozovky, ktorá má priamy dopad na bezpečnosť prevádzky na cestnej komunikácii. Keywords 3D data processing, road surface degradation, laser scanner, surface texture, road safety 1 INTRODUCTION Degradation of the road surface (defects like potholes, cracks, humps, waves, ruts or depressions) has direct impact on both comfort and safety of the road traffic. It also influences the lifespan of the vehicle components since it causes excessive vibrations and shockwaves. Drivers during the effort to anticipate the defects sometimes make dangerous maneuvers, which increase the risk of an accident. Since the constantly increasing intensity of the road traffic shortens the lifespan of the road surface, its quality has to be checked periodically. The aim of this paper is a method which would allow early detection of the defects on the road surface. There are several methods and devices developed for the measurement of the road surface’s defects. Manual methods of the measurement are recently replaced by methods based on electronic measurement devices. Large group of measurement devices are based on laser measurement. These systems estimate the distance between the device and the road surface from the measured time of flight of the laser impulse. Laser scanning of the surrounding environment is also deployed in * Ing., PhD., Department of Control and Information Systems, University of Žilina, Faculty of Electrical Engineering, Univerzitná 1, 01026 Žilina, Slovak Republic, (+421) 41 513 3333, dusan.nemec@fel.uniza.sk ** doc, Ing., PhD., Department of Control and Information Systems, University of Žilina, Faculty of Electrical Engineering, Univerzitná 1, 01026 Žilina, Slovak Republic, (+421) 41 513 3351, rastislav.pirnik@fel.uniza.sk *** Ing., PhD., Department of Control and Information Systems, University of Žilina, Faculty of Electrical Engineering, Univerzitná 1, 01026 Žilina, Slovak Republic, (+421) 41 513 3333, marian.hrubos@fel.uniza.sk brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by DSpace at VSB Technical University of Ostrava