[holding answer 23 June 2008]: Data on urban and inter-urban congestion can be found in the Department's Transport Statistics Bulletin, Road Traffic and Congestion in Great Britain Q1 2008 at:
Provisional data on inter-urban congestion up to March 2008 are included in this bulletin. May 2008 data will be released on 3 July. Data on urban congestion are included for the period to August 2007. We have not yet analysed our urban data after this date and so do not have an estimate of changes in congestion since then.
BERR have recently published new oil price projections in light of a consultation on them that ended early this year. They can be found at:
BERR propose reviewing these assumptions on a regular basis, at least annually.
We are currently in the process of producing new road transport forecasts (which will include congestion) based on these updated oil price projections. We are also aiming to release new appraisal guidance with fuel prices based upon them shortly.