Your travel plan will need to include a detailed audit of the area surrounding your development. For new developments the area on-site should be analysed using site plans, and for developments that already exist (in part) these should include an audit of the existing site.
You should include location maps, site plans and a polar plot within your travel plan, and follow the Contents Checklist to ensure you have included an adequate range of information.
Use the worksheets and guidance if you need any further help with the level of detail needed. The Site Audit and Design Guidelines deal with assessing current travel provision to and through your site, identifying problems and spotting opportunities. You can also download tools to help you with your audit.