WIM Networks

Site Types

There are generally two types of WIM sites established over a road network: Temporary sites are sites installed by trained local district/regional operatives, and they do not require a high level of accuracy. Temporary sites can be used to gain knowledge of what loads are on different subsets of the network and generally do not have their results added into…
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Network Strategy

A WIM strategy should consider the following: What is the purpose of WIM data, whether it will be primarily used for planning and asset management purposes, or for enforcement of illegally overloaded vehicles including on toll roads or a combination of purposes. The purpose of the data will influence the type of sites, permanent, portable etc, their number, location and…
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System Evaluation

The evaluation of a WIM system is the process of quantifying its performance (fitness for purpose and condition) in undertaking the application for which it was chosen. Typical performance criteria used in the initial or ongoing evaluation and appropriateness for specific application(s) of WIM systems are: application – need, network or project level, low or high speed installation requirements –…
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System Costs

As with any other road asset, the costs of any WIM system can be expressed in terms of the life cycle costs consisting of: initial capital cost (in-road WIM equipment, installation labour and materials, initial calibration and traffic control) and maintenance or on-going costs (labour and materials, traffic control and system recalibration). Roadside cabinets, WIM electronics, power and communication costs…
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Current Practices

The table below lists the number of Australian and New ZealandWIM sites by type (as at March 2010). Table: WIM sites of each type within Australia and New Zealand Jurisdiction Culway Plate-in-road Piezoelectric ACT 0 1 0 NSW 11 13 5 VIC 17 1* 2 QLD 19 2 33 SA 8 0 0 WA 8 0 3 TAS 4 0…
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