This PAN aims to create greater awareness of how linkages between planning and transport can be managed. It highlights the roles of different bodies and professions in the process and points to other sources of information.


Transport Assessment

D1. Transport Assessment concerns person trips, not car trips. It is a comprehensive assessment that should enable all the potential transport impacts of a proposed development or redevelopment to be fully understood. The objective should be to encourage sustainable travel in relation to the transport mode hierarchy. The assessment should be presented in clear language so that lay people can understand the implications.

D2. The assessment should present all the transport implications of the proposal but also aim to balance detailed analysis with simplicity. A comprehensive approach will provide more useful information for decision-makers but may well be an excessive burden on developers. A simple approach may be easier for developers, but not provide sufficient information for effective decisions to be taken.

D3. The development thresholds requiring a detailed Transport Assessment are set out in Transport Assessment and Implementation: A Guide but each application is considered on its own merits. Local authorities may lower the thresholds where appropriate, i.e. areas particularly sensitive to impact of additional traffic.

D4. These standards should form the basis of discussion and negotiation with a developer. Discussion between a developer and a local authority at an early stage should highlight any additional requirements or changes that may be needed to the layout and design of the proposal. On-going liaison will assist in reaching agreement so that later, and generally more expensive, changes will not be needed.

D5. Transport assessment should aim to provide supporting evidence to accompany the planning application to demonstrate that the development is sited in a location where current and likely future travel behaviour will produce a desired and predicted transport output.

D6. Transport Assessment should initially provide information on the proposal's compliance with key site policy. It should set out proposed methods of mitigation designed to reduce adverse transport impacts. Assessments should therefore include the following three main elements:

  • An assessment of travel characteristics;
  • A description of the measures which are being adopted to influence travel impacts of the proposal;
  • A description of the transport impacts of the development in a broader context and how these will be addressed.

The transport assessment process also incorporates scoping, travel planning and monitoring.

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