Of course this is the same BERR that forecasts that oil will be something like 70 dollars a barrel in 2020, with traffic levels 30% higher than now - hence the Department of Transport's bizarre determination to press ahead with more roads and runways. At least the UK airlines will have somewhere to park their redundant aircraft.

traffic has already "peaked" in the United States
http://www.road-scholar.org

despite this, no level of government anywhere in the US is calling for a moratorium on highway expansions