Determination of a strategic planning approach for maintenance management of a major road network

Smith, Scott David (2012) Determination of a strategic planning approach for maintenance management of a major road network. [USQ Project]

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Abstract

Road transport plays a major role in the Australian economy allowing people to travel to work and for the transport of goods to markets. For roads to function effectively they must be maintained to an acceptable level and each
road authority spends considerable sums of money each year maintaining their network. However, the funding supplied for maintenance is limited, and optimum expenditure of available funds is therefore paramount.

The objective of this study was to provide a starting point for the New South Wales (NSW) Roads and Maritime Services (RMS) Northern Region to implement a pavement maintenance strategy. In particular, the adoption of key performance indicators, suitability of using road deterioration modelling and investigating the point of rapid deterioration of a pavement were investigated. Currently the Region uses annual site inspections to prioritise
maintenance works with no road deterioration modelling used to forecast priorities.

Over the years numerous road deterioration models have been created. However, most of these models have been based on data collected overseas. This study has tested two of the latest road deterioration models
created for Australian conditions; the road deterioration for local roads model and the interim network level functional deterioration model. They have been tested to determine their suitability for use on roads in RMS Northern Region. The models have been tested by comparing deterioration predictions of roughness, rut depth and cracking against the last 11 years of road condition
data.

From the testing of the models it was found that the interim network level functional deterioration model predicted roughness and rut depths consistent with the measured values for a five year period. The road deterioration for local roads predicted roughness and rut depths consistent with the measured values for the full eleven year period tested. Neither model satisfactorily
predicted cracking. Based on the results it is considered that the models could be used by RMS Northern Region to forecast deterioration of similar roads within the Region. It is also believed that the models could be used by
RMS as a whole to predict deterioration of similar roads on the entire network.

In addition the relationship between deflections measured using the traffic speed deflectometer (TSD) and falling weight deflectometer (FWD) were investigated. FWD deflections are used to represent the strength of
pavement and sub grade in road deterioration models however the collection of this data is expensive and often hazardous. TSD data is cost effective and safe, but the results are not readily usable in road deterioration modelling at the current time. However the study did find a relationship between TSD and FWD deflections to enable TSD deflections to be used as an input to road deterioration models.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Supervisors: Ayers, Ron
Date Deposited: 20 Feb 2013 06:00
Last Modified: 20 Feb 2013 06:00
Uncontrolled Keywords: maintenance management; major road network; pavement maintenance
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090507 Transport Engineering
URI: http://eprints.usq.edu.au/id/eprint/23042

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