Figures on the cost of motorway closures to the economy are not routinely calculated.
However, delays are calculated for 91 routes covering most of the strategic road network, including strategic motorway routes in the North West. An estimate of daytime delays (6 am to 8 pm) for each of these routes is available for the period January to December 2007. This information was placed in the House Libraries of the House in response to an answer on
Figures are presented on a rolling year basis. Delay is calculated as the difference between observed journey time and a reference journey time (the time that could theoretically be achieved when the traffic is free flowing). Figures for average delays on motorways and trunk roads for individual regions are not calculated on this basis.