ABSTRACT
In the UK, extensive use is made of the PMS (pavement management system) information provided by the regular network-wide traffic-speed condition surveys of the trunk road network. These provide measurements which are used as proxy indicators of future failure. ‘Long Condition Tails’ are used from selected condition data, and their distribution curves, for measured condition parameters. The tail thresholds are set at meaningful indicator levels, which correlate well with the remaining service life of pavements.
Network Surveys used in the analysis are TRACS (Traffic speed condition surveys).
Construction and maintenance history information is held on the Highways England PMS, HAPMS (Highways Agency PMS).
This information has been reported over the last twelve years with the Remaining Service Life information, and they are used both at Strategic and Area levels across the 30,000 lane km of the trunk road network.
It has helped to compare the pavement assets with the average condition, over this time, by employing different proxy thresholds. This helps to see if the different parts of the network, (lane by lane), are either remaining at a steady state, deteriorating or improving, when compared with the average condition of the network.
There has been good correlation with historic allocations. They have helped justify increased funding, resulting in a large investment in road maintenance. They have also helped balance allocations across the twelve Highways England Areas, and compare the average condition with the twelve DBFO (design, build, finance and operate) Areas.
