Outline Business Case (for consultation October 2018)
This page features links to our draft Outline Business Case, including all supporting evidence (more than 40 documents).
These reports are the results of in-depth technical modelling work completed prior to the public consultation in October/November 2018.
A final version of these reports will be compiled and published prior to the Council’s decision on a Clean Air Zone.
Outline Business Case (Full reports)
| Document Title | Description of contents |
| Outline Business Case (PDF) | The business case to be submitted to central government to set out the need for the scheme, outline the details of the preferred option, and justify the requested funding |
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Signage, Boundary, Camera Plans (PDFs)
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Detailed drawings of the boundary, camera locations and signage locations |
| Clean Air Zone Signage Strategy (PDF) | Details of the planned signage strategy, including JAQU guidance and recommended sign faces |
| Clean Air Zone Boundary Updates (PDF) | Log of the CAZ boundary changes prior to modelling and the reasons behind them |
| Proposed System Design Features and Payment Exemptions (PDF) | Consideration of the system design features and payment exemptions/concessions considered |
| CAZ Data Flow Architecture (PDF) | Flow chart of the flow of data within the CAZ back office system |
| Stakeholder Management and Engagement Plan (PDF) | Summary of the key stakeholders for the project, details of engagement work undertaken to date and the plans for future engagement work |
| Options Assessment Report (PDF) | Summary of the selection of the preferred option, including both charging and non-charging measures |
| AQ2 Local Plan Air Quality Modelling Methodology Report (PDF) | Details of the air quality modelling methodology |
| AQ3 Air Quality Modelling Report (PDF) | Details of the air quality modelling results |
| T3 Local Plan Transport Modelling Methodology Report (PDF) | Details of the transport modelling methodology |
| ANPR Data Analysis and Application (PDF) | Summary of the ANPR surveys and details of the data analysis for use in the OBC |
| Local Model Validation Report: Addendum: LGV and HGV Validation (PDF) | Details of additional model validation work to ensure LGV and HGV flows are accurate |
| Primary Behavioural Response Calculation Methodology (PDF) | Details of how the behavioural responses of non‐compliant vehicles have been calculated |
| T4 Transport Modelling Forecast Report (PDF) | Details of the modelling process of future year scenarios, and the corresponding results |
| E1 Economics Appraisal Methodology Report (PDF) | Details the methodology of economic assessment, including the approach, key assumptions and the model structure |
| Distributional and Equalities Impact Analysis (PDF) | An assessment of the positive and negative benefits of the preferred option on key socio‐demographic groups |
| Bath CAZ Infrastructure Work Programme (PDF) | Project plan from now through to CAZ operation |
| Engagement Summary Report (PDF) | A summary of engagement activities to date including all identified issues, views and comments, with responses |
| Evaluation, Monitoring and Benefits Realisation Plan (PDF) | Details of how the benefits of the scheme will be monitored, evaluated and realised |
| Stated Preference Survey Report (PDF) | Details of the stated preference surveys undertaken to determine localised response rates of car or van drivers to a potential charging zone |
| Sensitivity Testing Technical Note (PDF) | Summary of sensitivity tests undertaken, adjusting known assumptions in the transport and air quality modelling |
| Environmental Assessment (PDF) | High level assessment of potential environmental impacts of the proposed scheme besides air quality improvements |
| Analytical Assurance Statement (PDF) | Considers the development of the base and baseline models, and the assessment of the shortlisted options |
| Equality Impact Assessment (PDF) | The Equality Impact Assessment |
| Financial Report (PDF) | This report provides the anticipated costs of the scheme, which includes both charging and non-charging measures. It remains in draft and is in the process of being further updated. Parts of the document have been redacted for reasons of commercial sensitivity. |
| CAZ System Cost estimates report (PDF) | This report provides the anticipated project costs of the scheme. It remains in draft and is in the process of being further updated. Parts of the document have been reacted for reasons of commercial sensitivity. |
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