The numbers of category 3 vehicles recorded travelling westbound on both Severn crossings in the last five years are recorded in the following table.
2008 2007 2006 2005 2004 January 137,759 134,869 129,761 127,078 129,840 February 136,686 129,896 126,091 128,835 128,570 March 135,672 149,375 148,576 142,514 149,912 April 142,564 138,498 132,031 142,484 138,525 May 141,324 148,754 145,714 138,623 138,604 June 137,414 145,641 147,376 145,306 146,776 July 144,900 151,450 143,295 142,417 148,518 August 129,931 146,676 143,308 140,714 139,502 September 138,264 141,487 142,566 143,872 147,489 October 142,618 154,104 148,308 143,056 144,250 November 128,216 151,385 149,910 146,799 148,896 December 119,414 126,566 126,594 127,921 132,820 Total 1,634,762 1,718,701 1,683,530 1,669,619 1,693,702
The number of category 3 vehicles registered in England, Wales, Northern Ireland, Scotland and other EU member states which use the crossings is not known. The operator of the crossings, Severn River Crossing Plc, does not collate such data.