00458230

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http://onlinepubs.trb.org...trr/1985/1048/1048-011.pdf

https://scholar.google.co...mehl&publication_year=1985

Truck weight information is used for (a) commerce, (b) statistical data, and (c) law enforcement. Single-draft weighing on a vehicle scale that meets the required basic maintenance tolerance of 0.2 percent of applied load is the only acceptable way to determine gross vehicle weight for commercial purposes. Axle-load scales and wheel-load weighers that meet basic maintenance tolerances of 0.2 and 2.0 percent of applied load, respectively, may be used to weigh trucks for the other two purposes. Tolerances and use requirements for weigh-in-motion (WIM) equipment have not yet been established by the National Bureau of Standards. Analysis of a data set from a carefully controlled field experiment in which 100 trucks were weighed statically on two different axle-load scales and at a slow speed on a WIM scale indicates that the weight of a truck is redistributed among the axles and wheels as the truck moves along the road surface and as it accelerates and stops for weighing on static scales. The variability in gross vehicle weights calculated from successive weighings of the axles or wheels of a truck on the axle-load and WIM scales that performed within small tolerances is discussed. Observed variations in axle-group weights, axle weights, and wheel weights under these conditions are also discussed. Implications of this analysis are that in establishing weight enforcement tolerances and interpreting statistical weight data consideration must be given to the fact that even though truck weight is virtually constant, it is not always distributed among the axles and wheels of the truck in the same proportions.

Publication of this paper sponsored by Task Force on Weigh-in-Motion. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01419448

pp 74-82

1985

Transportation Research Record

0309039649

Print

Figures (16) ; Tables (2)

Accuracy; Alternatives analysis; Axle load force; Gross vehicle weight; Trucks; Trucks by weight; Variables; Weigh in motion; Weighing devices; Weight; Wheel loads

Wheel load distribution

Highways; Maintenance and Preservation; Motor Carriers; Pavements; I23: Properties of Road Surfaces

TRIS, TRB

Sep 30 1986 12:00AM

• APPLICATION OF IN-MOTION WEIGHING USING INSTRUMENTED BRIDGES
• COMPUTERIZED PAVEMENT PERFORMANCE EVALUATION DATA BASE DEVELOPMENT FOR STRUCTURAL ADEQUACY, PRESENT SERVICEABILITY, AND DISTRESS ANALYSIS
• DEVELOPING STOCHASTIC FLEXIBLE PAVEMENT DISTRESS AND SERVICEABILITY EQUATIONS
• ESTIMATING LANEWISE TRAFFIC LOADING ON MULTILANE HIGHWAYS FROM WIM DATA
• ESTIMATION OF PAVEMENT LOADING FROM LIMITED VEHICLE VOLUME SAMPLING
• MODIFIED REFLEX-PERCUSSIVE GROOVES FOR RUNWAYS
• NETWORK SAMPLING TO ESTIMATE DISTRIBUTION OF PAVEMENT CONDITION AND COSTS
• OPERATION OF THE WASHINGTON STATE PAVEMENT MANAGEMENT SYSTEM
• OPTIMAL PAVEMENT MANAGEMENT APPROACH USING ROUGHNESS MEASUREMENTS
• TRANSPORTATION FACILITIES INFORMATION SYSTEM FOR PAVEMENT MANAGEMENT
• USE OF NONCONTACT PROBES IN ROAD PROFILING