█ _ 0 حصريا كتاب ❞ HIGHWAY ENGINEERING ❝ 2025 ENGINEERING: ENGINEERING HIGHWAY ENGINEERING Martin Rogers Department of Civil and Structural Engineering Dublin Institute Technology Ireland Blackwell s Preface, xiii Acknowledgements, xv 1 The Transportation Planning Process, 1 1 1 Why are highways so important? 2 administration highway schemes, 3 Sources funding, 2 1 4 Highway planning, 3 1 Introduction, Travel data, 4 1 planning strategies, 6 1 studies, 7 1 5 decision making process in transport 9 1 Economic assessment, 10 1 Environmental 11 1 Public consultation, 12 1 6 Summary, 13 1 7 References, 14 2 Forecasting Future Traffic Flows, 15 2 Basic principles traffic demand analysis, Demand modelling, 16 2 Land use models, 18 2 Trip generation, 19 2 distribution, 22 2 gravity model, 23 2 Growth factor 26 2 Furness method, 27 2 Modal split, 31 2 assignment, 34 2 8 A full example the four stage transportation modelling process, 36 2 production, 37 2 40 2 41 2 9 Concluding comments, 42 2 10 43 3 Scheme Appraisal for Projects, 44 3 appraisal 45 3 Cost benefit 46 3 Identifying main project options, all relevant costs benefits, 48 3 life, residual value discount rate, 50 3 Use economic indicators to assess basic viability, 51 3 CBA worked example, 53 3 COBA, 56 3 Advantages disadvantages cost 58 3 Payback 59 3 61 3 new approach (NATA), 66 3 72 3 72 4 Elements Analysis, 73 4 Speed, flow density a stream traffic, Speed relationship, 74 4 Flow 76 4 Determining capacity highway, 78 4 ‘level service’ approach, 79 4 Some definitions, 80 4 Maximum service rates multi lane highways, 81 4 86 4 Sizing road using Capacity Manual 90 4 UK rural roads, 92 4 Estimation AADT its year opening, urban 95 4 Forecast flows on 96 viii Contents 4 Expansion 12 16 hour counts into flows, 97 4 101 4 101 5 Design Intersections, 103 5 Deriving design reference from baseline figures, 104 5 Existing junctions, New Short term variations flow, Conversion highest hourly 105 5 Major minor priority intersections, Equations determining capacities delays, 110 5 Geometric layout details, 117 5 Roundabout 119 5 Types roundabout, 120 5 at roundabouts, 125 5 130 5 Basics signal control: optimisation 132 5 Phasing signalised intersection, 133 5 Saturation Effective green time, 138 5 Optimum cycle 139 5 Average vehicle delays signalised intersection, 142 5 queue lengths 144 5 Signal linkage, 146 5 remarks, 151 5 151 6 Alignment Design, 153 6 physical elements speed, stopping overtaking sight distances, 155 6 Urban 156 6 Rural 157 6 parameters dependent 162 6 Sight 163 Contents ix 6 163 6 Stopping distance, Overtaking 165 6 Horizontal alignment, 167 6 General, minimum radius equation, 168 6 curves 170 6 Transitions, 173 6 Vertical 178 6 K values, 179 6 Visibility comfort criteria, Parabolic formula, 180 6 Crossfalls, 183 6 crest curve distance requirements, sag 189 6 191 7 Pavement Materials 192 7 Soils subformation level, 194 7 CBR test, Determination plasticity index, 197 7 Subbase capping, 200 7 Thickness design, Grading subbase 201 7 loading, 203 7 deterioration, 208 7 Flexible pavements, Rigid 209 7 within flexible Bitumen, Surface dressing modified binders, 211 7 Recipe specifications, 213 7 Coated macadams, 214 7 Asphalts, 216 7 Aggregates, 217 7 Construction bituminous surfacings, 218 7 rigid 220 7 220 الهندسة المدنية مجاناً PDF اونلاين قسم خاص بكتب للتحميل مجال وهي أحد فروع والمعنية بدراسة وتصميم وتحليل المنشآت المختلفة كالأبنية السكنية والخدمية والطرق والجسور والأنفاق والمطارات والموانئ وشبكات إمداد مياه الشرب ومحطات ضخ المياه الصرف الصحي التنقية ومعالجة والسدود وكذلك مشاريع الري والإشراف عمل هذا أثناء فترة استمرارها لذا لا يجوز حصر العلم بأنه المعني بالتصميم وحده فقط وهي كأي علم تتطور باستمرار ودون توقف وفي الآونة الحديثة ترابطت مع التطور الصناعي بشكل كبير لإنتاج مواد إنشائية جديدة ومتطورة تفي بالمتطلبات التي تكون دائما متزايدة من المجتمع A special section books civil engineering that is one branches concerned with studying, designing analyzing various installations such as residential buildings, bridges, tunnels, airports, ports, drinking water supply networks, pumping stations, sewage purification treatment dams, well irrigation projects, supervising work this Establishments during period their continuation, it not permissible limit flag alone