The speed people travel outside your site determines the junction visibility requirement. The default assumption is that everyone travels at the speed limit. This is unlikely in a lot of situations. If you are struggling to achieve the default visibility at your site, a speed survey may justify a reduced provision.
Helix will carry out the speed survey (compliant with TA22/81) and the necessary analysis to determine your site specific visibility requirement.
In locations where the existing demand for on-street parking may, or does, cause obstruction to the highway, the local planning authority will be particularly concerned by a proposal that is likely to increase demand ore reduce provision.
If your development proposals have raised parking as a concern, Helix can provide, as required: a survey of the existing parking demand; a forecast of the likely future demand; measurement of parking capacity; or a redesign to maximise the parking capacity.