Why are you not showing exactly where the routes will go?

We have developed a consultation strategy to ensure stakeholder viewpoints are captured early in the process, to feed into the complex route design work that will follow. This involves undertaking a geographically wide consultation at an early stage, allowing us to capture requirements across a wide range of potential design options.

This strategy for consultation has been developed on the basis of feedback from previous consultation exercises.  In these exercises we have developed detailed designs  before consulting, and to undertake the detailed design we have had to make assumptions about local preferences .  However, experience has shown that stakeholders wish to be involved in the process at an earlier stage so that they can directly feed in requirements rather than relying on us to make assumptions; hence we are consulting early across wide swathes before we have narrowed the options.  This enables us to capture your requirements before detailed design work is undertaken.

We recognise that you need to understand the potential effects in order to provide a response.  Therefore while this consultation does not present a final design, it does describe the potential effects across the full range of options so that you can see clearly what the proposal could mean for you.

We have provided maps and data that indicate potential noise and visual impacts across wide consultation swathes covering all the options for route alignment.  These are accompanied by further maps showing today’s air traffic flows, for comparative purposes.

The noise and visual impact experienced at a given location will depend on where the route is positioned within the consultation swathe; high concentrations of traffic would be directly overhead only a small proportion of the overall area.  We are asking you to consider that the routes in question could be positioned anywhere within the consultation swathe, and to be mindful therefore that anywhere within the consultation swathe has the potential for noise and visual impact.

Information on the scale of potential impact is presented alongside or within the maps, describing:

•           The potential number of aircraft that would fly on the route and which may be overhead subject to the final route position within the consultation swathe

•           The altitude of these aircraft

•           A measurement of how loud aircraft at that height would sound at ground level (a metric referred to as Lmax)

With this information you can identify whether the potential impact is significant (i.e. the potential number of aircraft overhead, and the resultant noise and visual intrusion), and whether you wish to feedback to us specific local requirements to take into account in the detailed design stage.

Further details of how to interpret maps and data is provided in Section 4 of Parts B, C, D and E of the consultation material which is available through the ‘view the full consultation’ link at the top right hand of this page.

Posted in: e) Consultation Process