Development of Fleet Size Models for Egyptian Intercity Passenger Services DEVELOPMENT OF FUEL CONSUMPTION TO SPEED RELATIONSHIP FOR EGYPTIAN ROADS CONDITIONS A Methodology for Identifying the Social Benefits of Constructing Cairo-10th of Ramadan Rail Line in Egypt Effect of Road Humps on Performance Measures and Characteristics of Traffic Stream A Generalized Piecewise Regression for Transportation Models CALIBRATION OF VEHICLE EMISSIONS-SPEED RELATIONSHIPS FOR THE GREATER CAIRO ROADS STUDYING THE EFFECT OF CAR TECHNOLOGY ON CO EMISSIONS AND BENEFITS OF UPDATING VEHICLE FLEET USING FIELD TESTS Analysis of Road Traffic Accidents and Ranking of Sites Severity: A Case Study of EL Minia / Beni-suef Eastern Desert and Agricultural Roads, Egypt Effect of left turn traffic on control delay and guides to permit or protect it in signalized intersection