§ Ms Glenda JacksonTo ask the Secretary of State for Transport what percentage of the trunk road network within Greater London has a currently residual life of(a) less than 12 months, (b) between one and four years, (c) between five and nine years, (d) between 10 and 14 years, (e) between 15 and 19 years and (f) greater than 19 years; and if he will make a statement. [17250]
§ Mr. NorrisI have asked the chief executive of the Highways' Agency to write to the hon. Member.
Letter from Lawrie Haynes to Ms Glenda Jackson, dated 27 February 1996:
The Secretary of State for Transport has asked me to reply to your recent question about the residual life of the trunk road network in Greater London.430WWe do not keep residual life information in the form you have requested. This is because the form of construction of much of London's trunk road network is different to present day construction standards. Consequently the technical survey system we would normally use cannot reliably predict residual. Instead we assess the overall condition and life expectancy of the carriageways by taking into account other forms of surveys, underlying ground conditions, traffic volumes and any historical data we can muster.We continually monitor the condition of the trunk road network in London, bringing forward maintenance schemes as necessary. The priority and form of work for each is considered individually taking into account condition, cost and design life, as well as other special factors such as the scale of disruption caused by the alternative forms of works.