Internationally, significant attention is given to transport sustainability including planning, design, construction, evaluation, safety and durability of the road system. The 4th International Gulf Conference on Roads: Efficient Transportation and Pavement Systems - Characterization, Mechanisms, Simulation, and Modeling, hosted by the University of Qatar, November 2008, provided a forum for discussions of recent developments and research results and needs on transportation network optimization, traffic management, transportation safety, and pavement design, analysis, material characterization, modeling, and rehabilitation techniques. This book is a collection of 79 fully refereed papers and six keynote lectures from the conference, and includes contributions on a variety of topics:



Highway Design and Transportation Planning
Transportation Network and Management System
Traffic Characteristics and Analysis
Traffic and Transit Signal Control
Traffic Simulation, Safety, and Management
Advances in Road Safety Engineering
Road Accident Analysis and Prediction
Work Zone Lane Closures and Dynamic Merging
Flexible Pavement Design, Analysis, and Evaluation
Pavement Maintenance and Management
Binder and Emulsion Characterization - Effect of Binder, Modified Binder, and Fillers on HMA
HMA Testing and Properties
Foamed and HMA Recycling
Impact of Geogrids on Pavement Performance
Research, Development, and Standardizations
Case Studies