Development of deterioration models for local authority roads

Abstract

This paper describes the use of an 11-year time series of condition measurements obtained from a random sample of road sections on all classes of one local authority's roads to evaluate the changing condition of the sections. The condition has been defined in terms of macro-texture, rut depth and longitudinal profile. Deterioration models have been developed using the repeat measurements after allowing for routine measurements. The results have also allowed initial estimates of required maintenance cycles to be established for macro-texture and for the development of rut depths. Longitudinal roughness values collected as part of the study suggest that the roads included in the study have overall structural capacity and that only the surface layers deteriorate.

Multi-objective decision-aid tool for pavement management

“…This pavement performance model was chosen from a range of current models implemented in several PMS because it is widely used and tested. Nevertheless, other pavement performance models can be used instead, as for example the deterioration models developed for local authority roads by Stephenson et al (2004) or the deterioration models developed for use in the Swedish PMS . Equation (2.14)…”

“…This pavement performance model was chosen from a range of current models implemented in several PMS because it is widely used and tested. Nevertheless, other pavement performance models can be used instead, as for example the pavement performance models of HDM-4 (AIPCR, 2000), the deterioration models developed for local authority roads by Stephenson et al (2004) in the present serviceability index (∆PSI t-1,t ) corresponds to an estimated incremental change in load applications ((∆W 80 ) t-1,t ) and, at the same time, to an incremental service time interval (∆T t-1,t ). The Present Serviceability Index in year t (PSI t ) is defined as the difference between the serviceability index in year t-1 (PSI t-1 ) and the incremental change in the present serviceability index (∆PSI t-1,t ).…”

Long-term behavior of the micro-texture of aggregates used on roads subjected to extreme climate conditions and winter maintenance operations

“…Thus, their surface roughness, also known as micro-texture, is, with their size, angularity and shape (macro-texture [2]) responsible for the adherence between the pavement and the tires of the vehicles on roads [3][4][5]. Thereby, due to the importance of the micro-texture of the aggregates on traffic safety and long-term use or durability of the pavement (13-20 years [6,7]), their properties must be characterized by standardized methods.…”