Montana Department of Transportation

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Montana Weigh-in-Motion (WIM) and Automatic Traffic Recorder (ATR) Strategy

Montana's Weigh-In-Motion systems (WIMs) are stretched thin across the state's expansive road network. The problem is how to make best use of the extensive data collected from existing sites and where to place any additional WIMS or related investments. WIM recorders cost scarce money to install and maintain, so the sites must be located and used strategically. Automatic Traffic Recorders (ATRs) will also be added to analysis as they supplement the overall program. Among the complicating factors are the diversity of geographic regions and goods being trucked, seasonal variations associated with commodity hauls, and the continuing resources needed to make the system work.