A2 Bean and Ebbsfleet Junction Improvements Technical Appraisal Report 13 January 2017 HA543917-HHJV-GEN-PCF-0005
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Highways England A2 Bean and Ebbsfleet Junction Improvements Technical Appraisal Report 13 January 2017 HA543917-HHJV-GEN-PCF-0005 A2 Bean & Ebbsfleet Junction Improvements Technical Appraisal Report Document Control The Project Manager is responsible for production of this document, based on the contributions made by his/her team existing at each Stage. Document Title Technical Appraisal Report Author Philip Paterson Owner Hugh Coakley Distribution IPT Document Status Final Revision History Version Date Description Author 1.0 08/07/16 First external draft for comment Philip Paterson 1.1 20/09/16 Second external draft for comment Philip Paterson 1.2 25/11/16 Third issue for approval Philip Paterson 1.3 08/12/16 Fourth issue to address SRO comments Philip Paterson 1.4 13/01/17 Issued for publication Philip Paterson Reviewer List Name Role Mike Jones Highways England S&P TAME Philippa Lewis Highways England PTS Environment Nicholas Bentall Highways England PTS Safer Roads Group Hugh Coakley Highways England Integrated Project Team – Project Manager Andy Salmon Highways England SRO Approvals The Project SRO is accountable for the content of this document. Name Signature Title Date of Issue Version Andy Salmon Senior Responsible Owner Contents Volume 1 Report 1 Introduction 1 Purpose of this report 1 Background 1 2 Planning Brief 3 Highways England Business Objectives 3 Planning Objectives 3 3 Existing Conditions 4 Description of the Locality 4 Existing Highway Network 4 Existing Structures 4 Traffic 6 Accidents 8 Journey Time Reliability 9 Topography, Land Use, Property and Industry 12 Climate 13 Drainage 13 Geology 19 Mining 20 Public Utilities 21 Technology 23 Maintenance Operations/Maintenance Access 24 Environmental Status 24 Environment Environmental Baseline and Study Area 28 Accessibility and Integration 32 Maintenance and Repair Statement 32 4 Future Developments 34 Core Scenario 34 Lower Thames Crossing 34 London Paramount Entertainment Resort (London Paramount) 35 Developments Identified 35 Future Network Supply Assumptions 40 5 Planning Factors 43 Land Constraints 43 Environmental Constraints 43 Public Utilities 44 Existing Structures 44 6 Description of Junction Options 45 General 45 Concept Options 45 Long List Options 46 Short List Options 49 Drainage Assessment 54 Range estimates for shortlisted options 57 7 Traffic Analysis 58 Traffic Data 58 Traffic Analysis 60 TAR Issue Date: 13/01/17 Revision: 1.4 Operational Modelling 64 8 Economic Assessment 67 Introduction 67 Options Assessed 67 Economic Appraisal and Parameters 67 Grants and Subsidies 68 Appraisal Tools 68 Results of the User Benefits Assessments 69 Wider Economic Benefits 72 Overall Assessment 74 Appraisal Tables 75 9 Safety Assessment 76 Impact on Road Users – Strategic Safety Action Plan 76 Construction Health & Safety - Construction (Design and Management) Regulations 2015 76 10 Operational Assessment 79 Road Characteristics and Option Design Implications 79 11 Technology Assessment 80 Option Design Implications for the Use of Technology 80 12 Maintenance Assessment 81 Maintenance and Repair Strategy for Civils Infrastructure 81 Maintenance and Repair Strategy for Road-Side Technology 82 13 Environmental Assessment 85 Noise and Vibration 85 Air Quality 85 Landscape & Visual 86 Cultural Heritage 87 Ecology and Nature Conservation 88 Road Drainage and the Water Environment 89 Physical Activity 90 Journey Quality 90 14 Appraisal Summary 91 Appraisal Summary Tables 91 Summary of Consultation with Public Bodies 91 Comparison of Options 92 15 Programme 94 15.1 Assumption on Statutory Process 94 15.2 Outline Project Schedule to Completion 94 16 Stakeholder Engagements 96 16.1 Approach to Engagement Prior to Public Consultation 96 16.2 Engagement Activities Undertaken 96 17 Conclusions and Recommendations 99 17.1 Conclusions 99 17.2 Recommendations 101 TAR Issue Date: 13/01/17 Revision: 1.4 APPENDIX A: Existing Conditions Capacity Analysis 102 APPENDIX B: A2 Bean and Ebbsfleet Journey Time Routes 112 APPENDIX C: Scheme Effect B03E01b Turn Flow Schematics 137 APPENDIX D: Scheme Effect B04E01b Turn Flow Schematics 139 APPENDIX E: Scheme Effect B05E01b Turn Flow Schematics 140 APPENDIX F: Stage 1 Scenario Bean 03 + Ebbsfleet 01b (B03E01b) TEE, PA & AMCB Tables 142 APPENDIX G: Stage 1 Scenario Bean 04b + Ebbsfleet 01b (B04bE01b) TEE, PA & AMCB Tables 146 APPENDIX H: Stage 1 Scenario Bean 05 + Ebbsfleet 01b (B05E01b) TEE, PA & AMCB Tables 150 APPENDIX I: Appraisal Summary Tables 154 Table 1 - Number of accidents by year and severity 8 Table 2 - DfT Average Accident Rate WebTAG Databook 9 Table 3 - Local Accident Rate Calculations 9 Table 4 - Trafficmaster Journey Times 11 Table 5 - Details of Existing Drainage Catchments Zones and Discharge Points 13 Table 6 - Flooding incidents from HADMMS 14 Table 7 - Generalised Geological Succession 19 Table 8 - Summary of Technology 23 Table 9 - Core Scenario Future Development 36 Table 10 - A2 Bean and Ebbsfleet Uncertainty Log - Dartford Borough Council 38 Table 11 - A2 Bean and Ebbsfleet Uncertainty Log - Gravesham Borough Council 40 Table 12 - Stage 1 A2BE Forecast Highway Improvement Schemes 41 Table 13 - High Level Concept Options 45 Table 14 - Long List Options 46 Table 15 - Drainage Assessment - Option B03E01b 55 Table 16 - Drainage Assessment - Option B04bE01b 55 Table 17 - Drainage Assessment - Option B05E01b 56 Table 18 - Options Estimates 57 Table 19 - Core Scenario (Central Growth) Assignment Statistics – AM Peak (Cordon Model) 61 Table 20 - Core Scenario (Central Growth) Assignment Statistics – Inter Peak (Cordon Model) 62 Table 21 - Core Scenario (Central Growth) Assignment Statistics – PM Peak (Cordon Model) 62 Table 22 - User and Provider Benefits (£ PVB in 2010 prices, discounted to 2010) 70 Table 23 - Public Accounts (PVC £ 2010 prices, discounted to 2010) 71 Table 24 - AMCB Summary Table for Shortlist Options (PVB £m 2010 prices, discounted to 2010) 72 Table 25 - Wider Economic Benefits (£m 2010 prices, discounted to 2010) 74 Table 26 - Summary of Economic Results for A2 Bean and Ebbsfleet Options 2010) 74 (£m in 2010 prices, discounted to 2010) Table 27 - PACTS Projection of Road Casualties in Great Britain to 2030 76 Table 28 - Construction Health & Safety Impacts of the Options 78 Table 29 - Summary of inspection types with nominal intervals 81 Table 30 - Summary of Consultation with Public Bodies 91 Table 31 - Comparison of Options from an Environmental Perspective 92 Table 32 - Summary of principal stakeholder engagement events 96 Table 33 - Summary of Option Appraisal 99 Figure 1 - A2 Bean & Ebbsfleet Junction Improvements – Location Plan 2 Figure 2 - TRADS and 2014 Survey Locations 7 TAR Issue Date: 13/01/17 Revision: 1.4 Figure 3 - Accident Locations 8 Figure 4 - Journey Time Survey Routes – 1 of 2 10 Figure 5 - Journey Time Survey Routes – 2 of 2 11 Figure 6 - HADMMS Recorded Flood ‘Hotspots’ (not to scale) 16 Figure 7 - EA Source Protection Zone Mapping Overview (1 in 40:000 scale) 17 Figure 8 - EA Source Protection Zone Mapping Scheme Extents (1 in 20:000 scale) 17 Figure 9 - EA Groundwater Vulnerability Mapping Overview (1 in 40:000 scale) 18 Figure 10 - HADMMS Groundwater Flooding Susceptibility Overview 18 Figure 11 - Environmental Designations 26 Figure 12 - LTC Short List Options including LTC Location C Route 3 ESL 35 Figure 13 - A2 Bean and Ebbsfleet Development Areas (With Categorisation) 37 Figure 14 - Forecast Network Improvements in A2 Bean and Ebbsfleet area 42 Figure 15 - A2 Bean Option 3 52 Figure 16 - A2 Bean Option 4b 53 Figure 17 - A2 Bean Option 5 53 Figure 18 - A2 Ebbsfleet Option 1b 54 Figure 19 - A2 Bean and Ebbsfleet Screenline Locations 59 Figure 20 - Forecast Turn Flow Schematic Example – Scheme Effect 63 Figure 21 - Network coverage of microsimulation model 65 Figure 22 - Junction locations 82 Figure 23 - Indicative project schedule 95 TAR Issue Date: 13/01/17 Revision: 1.4 Volume 2 Drawings: Drawing Number Title Existing Conditions HA543917-HHJV-VUT-ZZZZ-DR-D-0001 Existing Services Sheet 1 of 4 HA543917-HHJV-VUT-ZZZZ-DR-D-0002 Existing Services Sheet 2 of 4 HA543917-HHJV-VUT-ZZZZ-DR-D-0003 Existing Services Sheet 3 of 4 HA543917-HHJV-VUT-ZZZZ-DR-D-0004 Existing Services Sheet 4 of 4 HA543917-HHJV-HGN-XXXX-DR-D-0144 Existing Road Layout Sheet 1 of 3 HA543917-HHJV-HGN-XXXX-DR-D-0145 Existing Road Layout Sheet 2 of 3 HA543917-HHJV-HGN-XXXX-DR-D-0146 Existing Road Layout Sheet 3 of 3 HA543917-HHJV-GEN-ZZZZ-DR-D-0167 Highways England Existing Maintenance Area Sheet 1 of 4 HA543917-HHJV-GEN-ZZZZ-DR-D-0168 Highways England Existing Maintenance Area Sheet 2 of 4 HA543917-HHJV-GEN-ZZZZ-DR-D-0169 Highways England Existing Maintenance Area Sheet 3 of 4 HA543917-HHJV-GEN-ZZZZ-DR-D-0170 Highways England Existing Maintenance Area Sheet 4 of 4 HA543917-HHJV-SGN-ZZZZ-DR-Z-1700 Existing Structures Sheet 1 of 3 HA543917-HHJV-SGN-ZZZZ-DR-Z-1701 Existing Structures Sheet 2 of 3 HA543917-HHJV-SGN-ZZZZ-DR-Z-1702 Existing Structures Sheet 3 of 3 HA543917-HHJV-HDG-ZZZZ-DR-D-0001 Existing Drainage Catchments HA543917-HHJV-HGT-ZZZZ-DR-GE-0007 Superficial Geology HA543917-HHJV-HGT-ZZZZ-DR-GE-0008 Bedrock Geology HA543917-HHJV-HGT-ZZZZ-DR-GE-0009 Soluble Rock and Natural Cavities Bean Junction HA543917-HHJV-HGT-ZZZZ-DR-GE-0010 Soluble Rock and Natural Cavities Ebbsfleet Junction HA543917-HHJV-HGT-ZZZZ-DR-GE-0011 Historic Mining and Quarrying Bean Junction HA543917-HHJV-HGT-ZZZZ-DR-GE-0012 Historic Mining and Quarrying Ebbsfleet Junction Planning Factors HA543917-HHJV-HGN-XXXX-DR-D-0051 Engineering