The SCANNER survey provides local authorities with an objective assessment of the condition of the (surveyed) local road network. Although there is considerable potential for the use of the SCANNER data both locally and nationally, centrally the DfT sees only the summary data reported as a National Indicator for each Local Authority. By storing the SCANNER data centrally the DfT would have access to a powerful database of network condition. Such a database would provide the potential to undertake a wide range of analyses. However, to provide such a central database there is a requirement to develop methods to take the data from the different local authority networks, surveys and survey contractors and fit this data to a single defined reference framework, against which each data set can be aligned, displayed and reported. There is then a need to develop procedures for the processing of the data so that additional information can be obtained (for example Road Condition Index (RCI) or NI values).
TRL was therefore commissioned by DfT to produce a methodology for the fitting of SCANNER data to a national reference framework (road network) to allow data to be viewed, processed and analysed on a national (rather than local) level. The results of this work are presented in this report.

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