maintenance costs
The lower specification vertical concrete barrier already installed on sections of the M25 has to date provided over ten years of maintenance free service.
HGV crash tests have demonstrated that, even after severe impact, no repairs are necessary to concrete barrier systems.
In comparison, there are around 1,200 repairs every year to steel barrier in the median on the M25, each one costing in excess of £3,000. This produced a total repair bill of £3.2million for the M25 sphere alone during the period September 2002 to August 2003.
