A Transport Assessment should be submitted for major traffic generating uses (see table of definitions). This should include existing and proposed vehicular and pedestrian movements to and from the site, details of arrangements for loading, servicing, manoeuvring and parking of vehicles. It should describe and analyse existing transport conditions, how the development would affect those conditions and measures to mitigate any impacts. It should also give details of proposed measures to improve access by public transport, walking and cycling, to reduce the need for parking associated with the proposal.
Further guidance can be found in Guidance on Transport Assessment, published by the Department for Transport (March 2007).
Draft Travel Plan
A draft travel plan should be submitted alongside planning applications for major traffic generating uses (see table). The plan should outline the way in which the proposed development will be managed in order to maximise the use of sustainable transport modes where practical.
The travel plan should have a strategy for its implementation that is appropriate for the development proposal under consideration. It should identify the travel plan coordinator, the management arrangements for the plan - e.g. a steering group, and the development timetable. The strategy should also include activities for marketing and promoting the plan to occupiers, users, visitors and residents of the site.
Further advice is available in Using the planning process to secure travel Plans: Best practice guide ODPM and DfT, 2002 (forthcoming revised guidance), also Making residential travel plans work: Good practice guidelines for new development: DfT and a guide to development related travel plan (Addison & Associates).