On motorways and trunk roads for which the Highways Agency are responsible, 210 bridges have been strengthened since 2000.
The management of the local road network in England, including maintenance of its bridges, is the responsibility of local highway authorities.
The Department for Transport provides funding to English local authorities, outside London, for highway maintenance, which they may decide to use for bridge strengthening, through their Local Transport Plan settlement capital allocations and through specific funding for maintenance for structures, including bridge strengthening, on the Primary Route Network (PRN). Funding in London is a matter for the mayor.
The numbers of structures funded under the PRN programme from 2005-06 inclusive of forward allocation to 2010-11 are:
Number 2005-06 127 2006-07 123 2007-08 115
A three year allocation was provided for 2008-09 to 2010-11. The number of structures funded for this period is 355.
Prior to 2005-06 the information is not available to this level of detail.
The strengthening of bridges owned by other bodies, such as Network Rail, is a matter for the respective bridge owners. Bridges in Wales are a matter for the Welsh Assembly.