asked Her Majesty's Government:
What assessment they have made of the impact that a third runway at Heathrow Airport would have on traffic levels in the local area.
As explained in the Government's consultation document Adding Capacity at Heathrow Airport last November, our primary focus has been on demonstrating the scope for further development within the environmental conditions laid down in 2003. We have also looked at how road traffic conditions would be expected to change over time and we report our provisional assessment of that in the consultation document (paragraphs 3.59 to 3.63 and 3.159 to 3.182). There is further detail in the supporting technical report on surface access available on the Department for Transport's website (http://www.dft. gov.uk/consultations/closed/heathrowconsultation/technicalreports/).