A robust methodology has been developed, in 2000–2001, to locate change points (i.e. clearly defined breaks) in New Zealand roads where significant changes in pavement performance occur.
Both pavement condition and construction data are required to apply the methodology, which utilises standard time-series and process control statistical techniques, ie auto-correlations and cusum methods respectively.
The methodology has considerable potential for generating treatment length subdivisions for new or existing road networks, or for dividing road networks into like-performing (homogeneous) sections for the purposes of deterioration modelling and asset management, in existing pavement management systems.
Keywords: analysis, change points, cucum method, management, New Zealand, normal scores transform, pavement, principal, components analysis, roads, statistical analysis, treatment lengths, segmentation