Transport assessment structure

All TAs should follow a clear, logical structure. An example high-level structure is provided here:

The precise structure and level of assessment will vary according to what is being proposed.

For large, more complex proposals, or proposals which do not comply with one or more London Plan transport policies, the TA is likely to need several sub-assessments. In these cases applicants are strongly advised to engage with TfL through the pre-application advice service in order to confirm requirements. 

The emphasis of the document should be on a logical and sequential flow from the baseline, through analytical techniques and outputs to an accurate forecast of future conditions on the transport network assuming the completion of the development. The document should follow a clear narrative that enables the lay reader to follow the logical progression from inputs to outputs to main findings and mitigation requirements. All information used in producing the assessment must be included in the document.

Referencing of data sources and input assumptions is essential. Data inputs or extracts used in analytical techniques or assessments should be provided in an appendix and summarised in the main text. The TA should justify their use and provide sufficient information to allow for independent analysis. It is not sufficient to append inputs without explaining fully how they are used in assessments.

Where particular assumptions have been made when manipulating or modelling data, these should be clear and explicit.

An executive summary of findings in all areas covered should be provided giving a concise synopsis of the report's findings, identifying key issues and mitigation.

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