Final business case submission

In November 2020 the Government approved our Full Business Case and announced the final approval of £98m towards the cost of funding the Third River Crossing.

Available case documents can be downloaded below. Any missing documents will be added shortly and can be provided on request if needed.

• GY3RC Full Business Case (PDF) [8MB]
• Appendix A - 3D Visualisations of the Scheme (PDF) [948KB]
• Appendix B - Detailed Project Programme (PDF) [217KB]
• Appendix C - Appraisal Summary Table and WebTAG Worksheets (Excel doc) [6MB]
• Appendix D - Detailed Cost Breakdown (PDF) [89KB]
• Appendix E - Risk Register and QRA (PDF) [657KB]
• Appendix F - Public Accounts (PA) Table (Excel doc) [22KB]
• Appendix G - Transport Economic Efficiency (TEE) Table (Excel doc) [26KB]
• Appendix H - AMCB Table (Excel doc) [20KB]
• Appendix I - S151 Officer Declaration (PDF) [119KB]
• Appendix J - Communication Strategy 2020 (PDF) [185KB]
• Appendix K - DfT Check Sheet (PDF) [174KB]
• Appendix L - DfT Clarification Questions (PDF) [207KB]

Clarification documents

• Clarification document 1 - Links with Speed Flow Curves (PDF) [3MB]
• Clarification document 2 - Calibration and Validation Sites (PDF) [3MB]
• Clarification document 3 - Signal Data (PDF) [49KB]
• Clarification document 5 - HGV SLA on Breydon Bridge (PDF) [533KB]
• Clarification document 5 - RSI Blending Factors (PDF) [59KB]
• Clarification document 6 - Prior Matrix SLA at RSI Sites (PDF) [889KB]
• Clarification document 8 - Prior Matrix SCL Validation (PDF) [73KB]
• Clarification document 9 - Link Calibration and Validation (PDF) [13MB]
• Clarification document 9 - Turning Count Validation (PDF) [282KB]
• Clarification document 11 - Base Year Flow Plots (PDF) [2MB]
• Clarification document 14 - VDM Area of Influence (PDF) [1MB]
• Clarification document 17 - Uncertainty Log (PDF) [535KB]
• Clarification document 20 - Matrix Totals (PDF) [59KB]
• Clarification document 21 - Journey Time Data (PDF) [830KB]
• Clarification document 21 - Junction VC Plots (PDF) [1MB]
• Clarification document 21 - Select Link Analysis (PDF) [6MB]

Supporting documents

• Supporting document 1 - Economic Appraisal Report (PDF) [1MB]
• Supporting document 2 - Active Mode Appraisal Report (PDF) [7MB]
• Supporting document 3 - Social and Distributional Impact Report (PDF) [7MB]
• Supporting document 4 - Wider Impact Benefits Technical Note (PDF) [998KB]
• Supporting document 5 - TUBA Methodology Technical Note (PDF) [1MB]
• Supporting document 6 - Scheme Costs Technical Note (PDF) [5MB]
• Supporting document 7 - Variable Demand Model Report (PDF) [1MB]
• Supporting document 8 - Monitoring and Evaluation Plan (PDF) [2MB]
• Supporting document 9 - Benefits Realisation Plan (PDF) [959KB]
• Supporting document 10 - Additional Modelling Information (PDF) [332KB]