§ Baroness Byfordasked Her Majesty's Government:
Whether traffic planners in the South East are required to take special account of congestion caused by journeys to and from Heathrow; and, if so, what radius from Heathrow is covered by the requirement. [HL247]
§ Lord Macdonald of TradestonThere is no government guidance to the transport planning profession requiring that special account be taken of congestion caused by journeys to and from Heathrow.
Heathrow Airport clearly has a major impact on traffic levels, though it is not the only contributor to congestion in the area. The South East and East of England Regional Air Service study and the Orbit (M25) and Thames Valley multi-modal studies have all carried out computer modelling of transport networks, including those in the vicinity of Heathrow.