ASTM E1318-09(2017)
- Standard Specification for Highway Weigh-In-Motion (WIM) Systems with User Requirements and Test Methods
- standard by ASTM International, 01/01/2017
- Category: ASTM
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1.1 Weigh-In-Motion-This specification describes Weigh-In-Motion (WIM), the process of measuring the dynamic tire forces of a moving vehicle and estimating the corresponding tire loads of the static vehicle. Gross-vehicle weight of a highway vehicle is due only to the local force of gravity acting upon the composite mass of all connected vehicle components, and is distributed among the tires of the vehicle through connectors such as springs, motion dampers, and hinges. Highway WIM systems are capable of estimating the gross weight of a vehicle as well as the portion of this weight, called load in this specification, that is carried by the tires of each wheel assembly, axle, and axle group on the vehicle.
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