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Previous studies have applied various benchmarking approaches to measure the performance of organisations that are responsible for maintaining the pavements under their jurisdiction. However, there is a paucity of research investigating the influence of uncontrollable ‘environmental’ factors, such as climate and subgrade type, on the efficiency of these organisations. Quantifying and evaluating the influence of such factors has been a difficult proposition, with previous attempts being qualitative and subjective. This study introduces a set of quantitative and objective indicators that reflect the relative difficulties faced by road agencies in New Zealand, in terms of climate and subgrade type, and proceeds to aggregate these environmental factors on an agency by agency basis. It then demonstrates the influence of these uncontrollable variables on the performance of the agencies through comparison to a baseline benchmarking model, using a non-parametric Data Envelopment Analysis approach. The resulting efficiency differences, due to the external operating environment, underlines the significance of including these variables when benchmarking to enable a fair comparison of pavement management efficiency.

Evaluating the influence of climate and subgrade type on the benchmarking of pavement management efficiency