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Received: (14 January, 2021) Revised: (24 March, 2021) Accepted: (28 March, 2021) Mokhtar F. Ibrahim, Lecturer of Highway and Traffic Engineering, Civil Engineering, High Institute of Engineering El Shorouk Academy, Egypt.(Email: mokhtargendy91@gmail.com). Corresponding Author: Ahmed AbdELazim M.Ali, M.sc Student, Civil Engineering, High Institute of EngineeringEl Shorouk Academy, Egypt. (E-mail: Ahmedabdelazim340@gmail.com). Abdelzaher E. Mostafa, Professor. of Highway and Airport Engineering, Public Works Department, Faculty of Engineering, Helwan University, Egypt. (E-mail: E-mail: Zaher292@yahoo.com). A. abdelghany M, Lecturer of Highway and Traffic Engineering, Civil Engineering, Public Works Department, Faculty of Engineering, Helwan University , Egypt.(E-mail: traffic_roads@yahoo.com). mixes [1,2]. Generally, pavement construction should be characterized by quality, economic, and safety. Traffic safety and efficiency of the road system had increasing importance for management agencies. Thus, friction evaluation has become an important tool in the management of pavement surfaces [3]. The main concern of any transportation system is achieving the safety of highways network. There are several causes of road accidents; one of these is the sliding texture of pavement surface. Uncontrolled skidding due to inadequate surface friction and poor visibility due to splash and spray have been found to be the two primary causes of wet weather crashes with skidding alone contributing to 15% to 35% of all wet weather accidents [4]. Providing an adequate texture depth has been conducted by Forster S.W. [5] to improve pavement friction test results at high speeds and reduce crash rates on high speed facilities. Acceptable pavement surface against sliding mainly depend on both of mix components and environmental conditions. Gradation and properties of aggregate affected the friction between pavement surface and vehicle tires [5, 6]. Frictional resistance of the wearing course Evaluation of the Safety of Flexible Pavement using Skid Resistance Measurements

Evaluation of the Safety of Flexible Pavement using Skid Resistance Measurements.(Dept.C)