Developing Measures of Effectiveness for Truck Weight Enforcement Activities Final Report (1998) / Chapter Skim
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APPENDIX H Glossary of Terms
APPENDIX H Glossary of Terms
Pages 253-267
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From page 253... ...
two or more consecutive axles considered together in determining their combined load effect on a bridge or pavement structure. aucie load - the weight carried by one axle of a vehicle.
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From page 254... ...
bridge formula limit - the Federal law states that any group of two or more consecutive axles may not exceed the weight as computed by the Bridge Formula even though the single axle, tandem axles, and gross weights are within legal requirements. bypass - routes (usually state roads)
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From page 255... ...
equivalent single axle loads fESALs) - the unit of measurement equating the amount of pavement consumption caused by an axle or group of axles, based on the loaded weight of the axle group, to the consumption of a single axle weighing 18,000 pounds.
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From page 256... ...
were formed about 12 years ago to encourage uniform administration of the Mel tax laws, and to establish a base state arrangement for collecting and administering fuel taxes. full frailer - a truck trailer with wheels on the front and rear (as opposed to a semitrailer in which the front rests on the rear of the tractor)
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From page 257... ...
International Fuel Tax Agreement (IFTA) - This agreement was established about twelve years ago to encourage uniform administration of the motor fuel taxation laws, and to establish a base state arrangement for collecting and administering fuel taxes.
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From page 258... ...
Wing patrols occur on bypass routes around fixed weigh stations and can be scheduled either as a special detail or as an ongoing operation. Portable enforcement occurs in areas where there are no weigh stations, and inspectors carry semi-portable ramp scales in their vehicles.
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From page 259... ...
- MCMIS is the central federal repository of comprehensive safety data on more than 265,000 interstate motor carriers. Information is kept on a central mainframe computer and is exchanged electronically with computers in all federal field offices and MCSAP state offices using SAFETYNET software.
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From page 260... ...
pavement performance - the trend of serviceability with load applications. pavement structure - a combination of subbase, base course, and surface course placed on a subgrade to support the traffic load and distribute it to the roadbed.
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From page 261... ...
Another AVI reader within the weigh station will again read the truck identification transponder as the truck passes and again will pass the identification to the weigh station computer. The computer will execute a processing sequence to automatically acquire axle arid gross vehicle weights, verify legal weight in that jurisdiction, and check that the operating credentials are valid.
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From page 262... ...
rigid pavement - a pavement structure which distributes loads to the subgrade, having as one course a Portland cement concrete slab of relatively high-bending resistance. S SAFETYNET- This is a distributed system for managing safety data on both interstate and intrastate motor carriers and for federal and state offices to electronically exchange data on interstate carriers with MCMIS.
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From page 263... ...
. single axle load - the total load transmitted by all wheels whose centers may be included between two parallel transverse vertical planes 40 inches apart, extending across the full width of the vehicle.
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From page 264... ...
subbase - the layer or layers of specified or selected material of designed thickness placed on a subgrade to support a base course (or in the case of rigid pavements, the Portland cement concrete slab)
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From page 265... ...
tridum axle - my three consecutive axles whose extreme centers are not more than 144 inches apart, and are individually attached to or articulated hoary, or both, a common attachment to the vehicle including a connecting mechanism designed to equalize We load between axles. truck - a motor vehicle designed, used, or maintained primarily for the transportation of property.
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From page 266... ...
vehicle titling - A motor carrier operator must show proof of ownership by registering the title of the vehicle with the state in which it is stationed. W weight-in-motion - the process of estimating a moving vehicle's gross weight and the portion of that weight that is carried by each wheel, axle, and/or axle group, by measurement and analysis of dynamic forces applied by its tires to a measuring device.
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From page 267... ...
weight station - a location equipped with weight scales at which the axle weights arid gross weights of vehicles are determined. weight violation - a single axle weight, axle group weight, or gross weight of a vehicle exceeding the maximum allowed weight for that vehicle.
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Key Terms
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