Inputs overview

Scoping and pre-application procedure

The production of a scoping document for the TA can significantly improve the pre-application process for larger documents, where the transport analysis is complex and will require consultation with a number of different business areas (via Borough Planning).

This transport assessment checklist should help to inform the scoping exercise. It identifies both the essential requirements and any optional analysis that may be required. If core topics are not scoped out due to their lack of relevance to the particular scheme, this must be clearly justified.

The scoping document should set out the main details of the scheme and transport aspects to be assessed. This should include a brief discussion of how the assessment will be carried out, data sources, assumptions and the methodology used. A discussion of any mitigation measures, such as planning obligations or section 278 agreements, may also be necessary. An early dialogue on these issues should assist the progress of the planning application.

The scoping process should be used to justify the level of analysis that is proposed. For example, the extent of highway, public transport or strategic modelling. The analysis periods to be covered should also be set out for agreement. This will vary by land use - office uses are likely to require an analysis of the weekday peak period, while for retail and leisure uses, evenings and weekends may also be significant.

The production of the TA should involve the consideration of all relevant modes and the use of a range of modelling and analytical techniques. A pre-application meeting with TfL will enable the data exchange necessary for accurate capacity and accessibility analysis. TfL can specify areas that analysis should focus on and give advice on specific analysis techniques. The following guidance should help to inform this process by setting out the expectations of TfL.

TfL encourages the submission of drafts for comment during the pre-application period, enabling refinements to be made to the TA in advance of the submission of a planning application.

Transport assessment inputs

The following transport assessment (TA) checklist identifies the information that TfL regards as essential to facilitate an adequate appraisal of the transport impact of a development. This is a generic list of inputs and is not exhaustive. Additional relevant information should be included where it is material to understanding the effects of the development.

Particularly on larger, more complex schemes, applicants are strongly advised to engage early with TfL through the pre-application process in order to ensure that all necessary elements are covered in the TA.

Development details  

The location and context of the proposed development should be clearly illustrated. A site layout plan should be included with any extant uses clearly identified. Any relevant planning history pertaining to the site should be explained. For example, previous consents where planning obligations or conditions were agreed or imposed.

A site plan showing the geographical location of the proposed development and a plan showing the proposed development should always be included, showing access arrangements for people and goods. The size and nature of the development should be considered for each type of land use.

Details of the phasing of the development should be included where known.

This development details by land use table lists the development details required for the more common land uses that have transport impacts.

Baseline data

A description of the site location and current land use should be provided along with a full description of the existing transport infrastructure conditions. It should be noted when the baseline data was collected. It is very important for TfL to understand the baseline conditions and assumptions being made.

All modes of transport, both private vehicles and public transport, serving the site should be discussed. This baseline inputs table sets out the main requirements.

Photos, mapping and diagrams should be used to present the existing situation, including the illustration of catchment areas for sites by cycling, walking and, if possible, public transport.

Setting out the existing accessibility (usually the Public Transport Accessibility Level) of the development site is vital for the assessment. View further details regarding accessibility analysis.

Please see the trip generation, highways assessment and individual business area sections for further detailed information regarding transport assessment inputs.

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