MINISTRY OF PUBLIC WORKS AND TRANSPORT(MPWT) THE ROYAL GOVERNMENT OF THE KINGDOM OF CAMBODIA PREPARATORY SURVEY FOR NATIONAL ROAD NO. 5 IMPROVEMENT PROJECT (MIDDLE SECTION: THLEA MA'AM – BATTAMBANG, AND SRI SOPHORN – POIPET) IN THE KINGDOM OF CAMBODIA FINAL REPORT (VOLUME I MAIN REPORT) OCTOBER 2014 JAPAN INTERNATIONAL COOPERATION AGENCY KATAHIRA & ENGINEERS INTERNATIONAL EI JR (先) 14-178 (1) Exchange Rate US$ 1.0 = JPY 102.93 KHR 1.0 = JPY 0.025 As of August 2014 Location Map of Survey Area Preparatory Survey for National Road No.5 Improvement Project (Middle Section: Thlea Ma’am – Battambang, and Sri Sophorn – Poipet) TABLE OF CONTENTS Location Map Table of Contents List of Appendix List of Tables List of Figures List of Abbreviations CHAPTER 1 INTRODUCTION ................................................................................................... 1-1 1.1 Background of the Survey ................................................................................................... 1-1 1.2 Objective of the Survey ....................................................................................................... 1-1 1.3 Survey Area ......................................................................................................................... 1-2 1.4 Scope of Work ..................................................................................................................... 1-2 1.5 Survey Schedule .................................................................................................................. 1-3 1.6 Organization of the Survey .................................................................................................. 1-5 CHAPTER 2 PROFILE OF THE SURVEY AREA ..................................................................... 2-1 2.1 Physical Profile .................................................................................................................... 2-1 2.2 Socio - Economic Profile .................................................................................................... 2-9 CHAPTER 3 NATIONAL ROAD NETWORK OF CAMBODIA AND ROLE OF NATIONAL ROAD NO. 5 ..................................................................................... 3-1 3.1 National Road Network of Cambodia ................................................................................. 3-1 3.2 Development Plan ............................................................................................................... 3-2 3.3 Role of National Road No. 5 ............................................................................................... 3-7 3.3.1 Role in the National Road Network and Role as an International Arterial Road ........ 3-7 3.3.2 Benefit to Japanese Businesses ................................................................................. 3-10 3.4 Planned, Ongoing and Past Project for Rehabilitation / Improvement of NR 5 and Other Relevant Project ...................................................................................................... 3-11 3.5 Necessity of Improvement of the Middle Section and the Sri Sophorn - Poipet Section .. 3-14 CHAPTER 4 PRESENT CONDITION OF MIDDLE SECTION AND SRI SOPHORN – POIPET SECTION .................................................................... 4-1 4.1 Overall Conditions .............................................................................................................. 4-1 4.2 Geometric Structure ............................................................................................................ 4-4 4.2.1 Cross Section ............................................................................................................... 4-4 4.2.2 Horizontal Alignment .................................................................................................. 4-5 4.2.3 Vertical Alignment ...................................................................................................... 4-7 4.3 Pavement ........................................................................................................................... 4-12 i Preparatory Survey for National Road No.5 Improvement Project (Middle Section: Thlea Ma’am – Battambang, and Sri Sophorn – Poipet) 4.4 Bridge Condition ............................................................................................................... 4-14 4.4.1 Inventory of Bridges .................................................................................................. 4-14 4.4.2 Condition of Bridges ................................................................................................. 4-19 4.4.3 Condition of Bridge Members ................................................................................... 4-24 4.5 Roadside Land Use ............................................................................................................ 4-26 4.5.1 Land Use along NR 5 ................................................................................................ 4-26 4.5.2 Occupancy of ROW by Roadside Shops and Utilities .............................................. 4-28 4.6 Utilities .............................................................................................................................. 4-28 CHAPTER 5 FUTURE TRAFFIC DEMAND FORECAST ........................................................ 5-1 5.1 Methodology ....................................................................................................................... 5-1 5.2 Traffic Survey Data ............................................................................................................. 5-2 5.3 Socio-Economic Framework ............................................................................................... 5-3 5.3.1 Future Socio-Economic Framework ............................................................................ 5-3 5.4 Future OD Table .................................................................................................................. 5-7 5.4.1 Zoning System ............................................................................................................. 5-7 5.4.2 Preparation of Present OD Table ................................................................................. 5-9 5.4.3 Trip Generation and Attraction ................................................................................... 5-9 5.4.4 Future OD Matrix (Future Traffic Demand) ............................................................. 5-13 5.4.5 Modal Split ................................................................................................................ 5-15 5.5 Traffic Demand Forecast ................................................................................................... 5-15 5.5.1 Traffic Assignment .................................................................................................... 5-15 5.5.2 Peak Hour Traffic Volume and Congestion .............................................................. 5-21 5.5.3 Traffic Volume on Bypass ......................................................................................... 5-22 CHAPTER 6 NATURAL CONDITION OF SURVEY AREA/SURVEY ROAD ....................... 6-1 6.1 Hydrological Condition and Flood Records ........................................................................ 6-1 6.1.1 River System and Existing Drainage Facilities ........................................................... 6-1 6.1.2 Water Level of The Mekong River and The Tonle Sap River and Lake ................... 6-14 6.1.3 Information of Road Inundation/Flood ..................................................................... 6-18 6.1.4 Estimated Flood Discharge from Mountains ............................................................. 6-25 6.1.5 Study of the Flood of 2013 ........................................................................................ 6-31 6.2 Topographical Survey ....................................................................................................... 6-38 6.2.1 Objective ................................................................................................................... 6-38 6.2.2 Contents ..................................................................................................................... 6-38 6.2.3 Detail and Output ...................................................................................................... 6-39 6.2.4 Landmine Clearance .................................................................................................. 6-43 6.2.5 Result of Survey ........................................................................................................ 6-43 6.3 Aerial Photo Survey .......................................................................................................... 6-44 6.4 Geotechnical Investigation ................................................................................................ 6-46 ii Preparatory Survey for National Road No.5 Improvement Project (Middle Section: Thlea Ma’am – Battambang, and Sri Sophorn – Poipet) 6.4.1 CBR Tests of Existing Subgrade ............................................................................... 6-46 6.4.2 Geotechnical Investigation for Bridges ..................................................................... 6-48 6.4.3 Geotechnical Characteristics of the Survey Area ...................................................... 6-57 6.4.4 Soil Parameter ..........................................................................................................