Highway Engineering covers all the necessary basic foundation material needed by civil engineers to address the analysis, design and construction of highways. It covers central topics such as geometric, junction and pavement design, structural design and pavement maintenance, while also ensuring an adequate grasp of traffic analysis. It places the topic in context by introducing the economic, political, social and administrative dimensions of the subject – essential understanding for all engineers. Special Features ·Moves in a logical sequence from the planning and economic justification for a highway, through the geometric design and traffic analysis of highway links and intersections, to the design and maintenance of both flexible and rigid pavements ·Covers geometric alignment of highways, junction and pavement design, structural design and pavement maintenance ·Includes detailed discussions of traffic analysis and the economic appraisal of projects ·Makes frequent reference to the Department of Transport’s Design Manual for Roads and Bridges Table of Content Preface Sources 1 The Transportation Planning Process 1.1 Why are highways so important? 1.2 The administration of highway schemes 1.3 Sources of funding 1.4 Highway planning 1.5 The decision making process in highway and transport planning 1.6 Summary 1.7 References 2 Forecasting Future Traffic Flows 2.1 Basic principles of traffic demand analysis 2.2 Demand modelling 2.3 Land use models 2.4 Trip generation 2.5 Trip distribution 2.6 Modal split 2.7 Traffic assignment 2.8 A full example of the four stage transportation modelling process 2.9 Concluding comments 2.10 References 3 Scheme Appraisal for Highway Projects 3.1 Introduction 3.2 Economic appraisal of highway schemes 3.3 CBA 3.4 Payback analysis 3.5 Environmental appraisal of highway schemes 3.6 The New Approach to Appraisal 3.7 NATA Refresh (Department for Transport, 2008) 3.8 Summary 3.9 References 4 Basic Elements of Highway Traffic Analysis 4.1 Introduction 4.2 Surveying road traffic 4.3 Journey speed and travel time surveys 4.4 Speed, flow and density of a stream of traffic 4.5 Headway distributions in highway traffic flow 4.6 Queuing analysis 4.7 References 5 Determining the Capacity of a Highway 5.1 Introduction 5.2 The level of service' approach using Transportation Research Board (1994) 5.3 Methodology for analysing the capacity and level of service of highways within Transportation Research Board (2010) 5.4 The UK approach for rural roads 5.5 The UK approach for urban roads 5.6 Expansion of 12 and 16 h traffic counts into AADT flows 5.7 Concluding comments 5.8 References 6 The Design of Highway Intersections 6.1 Introduction 6.2 Deriving DRFs from baseline traffic figures 6.3 Major / minor priority intersections 6.4 Roundabout intersections 6.5 Basics of traffic signal control: Optimisation and delays 6.6 Concluding remarks 6.7 References 7 Geometric Alignment and Design 7.1 Basic physical elements of a highway 7.2 Design speed and stopping and overtaking sight distances 7.3 Geometric parameters dependent on design speed 7.4 Sight distances 7.5 Horizontal alignment 7.6 Vertical alignment 7.7 References 8 Highway Pavement Materials and Loading 8.1 Introduction 8.2 Soils at sub formation level 8.3 Traffic loading 8.4 Materials within flexible pavements 8.5 Materials in rigid pavements 8.6 References 9 Structural Design of Highway Pavements 9.1 Introduction 9.2 Pavement components: Terminology 9.3 Foundation design 9.4 Pavement design 9.5 References 10 Pavement Maintenance 10.1 Introduction 10.2 Pavement deterioration 10.3 Compiling information on the pavement's condition 10.4 Forms of maintenance 10.5 References 11 The Highway Engineer and the Development Process 11.1 Introduction 11.2 Transport assessments 11.3 Travel plans 11.4 Road Safety Audits 11.5 References 12 Defining Sustainability in T