SCANNER surveys were introduced in 2009 to provide network-wide condition assessment of the local A, B and C road network using survey vehicles that travel at traffic-speed measuring the shape of the road surface using laser sensors, and imaging the surface using digital cameras. The collected data is processed and converted into condition parameters, such as rutting, and delivered in a UKPMS-compliant format to local authorities, for loading into their pavement management systems. It is also used to identify lengths in need of maintenance or further investigation, and to support scheme identification and prioritisation. The data also supports asset valuation, via the Carriageway Condition Index (CCI), which is a methodology recognised by HAMFIG and CIPFA for use in Whole of Government Accounts (WGA) and for reporting within local authorities’ own accounts.

SCANNER was developed from the Highways Agency’s TRACS survey of the strategic road network. Research supported by the DfT, was carried out between 2003 and 2007 to adopt the survey for local roads. This delivered a range of outcomes, including an updated survey specification, a set of “enhanced” parameters focussed on narrower local roads, and the definition for the SCANNER Road Condition Indicator (RCI), which is used to estimate the overall condition of each length of the network.

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