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Road Traffic

Transport written question – answered on 24th January 2011.

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Photo of Graham Stringer Graham Stringer Labour, Blackley and Broughton

To ask the Secretary of State for Transport what the difference was between actual congestion levels and those projected by his Department in each of the last five years.

Photo of Norman Baker Norman Baker The Parliamentary Under-Secretary of State for Transport

holding answer 20 January 2011

The Department for Transport produces congestion forecasts for certain years using the National Transport Model. The latest forecasts are available at:

However, the first year for which forecasts are provided in this report is 2015. The most recent available set of congestion forecasts for 2010, can be found in: "Road Traffic Forecasts 2008: Results from the Department for Transport's National Transport Model", which is available at:

These forecasts show that congestion, measured in terms of delay on all roads in England was expected to increase by 1% between 2003 and 2010, and decrease by 1% on inter-urban Highways Agency roads.

The Department publishes inter-urban congestion statistics, the latest summary of these is available at:

From the above report, historic delay data for all journeys from July 2005 can be accessed at:

Although there is a break in the data series, this shows that the average length of delay experienced by users of the strategic road network was broadly similar in November 2010 to July 2005.

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