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This document presents the findings obtained in a comparative study of conventional and wide base radial truck tires. The primary objective of the study was an assessment of the effect on highway safety when heavy trucks operate on wide base single tires instead of conventional dual tires. The study included laboratory and field tests conducted by the Texas Transportation Institute during the calendar years 1990 and 1991. The research focused on two aspects of tire performance relevant to highway safety, stopping distance and dynamic hydroplaning. The study conclusion was that the adoption of wide base radial truck tires will not adversely impact highway safety.
Current operating practice in the trucking industry related to tire pressures and truck tires are summarized. Findings of recent (since 1987) pertiment pavement performance research including both full-scale and analytical pavement response and performance studies are discussed. Pertinent findings developed in previous literature reviews are also included. Regulatory approaches developed by the various states based on information from a telephone survey conducted during July and August 1991 are included. Economic analyses are used to compare the increased annualized bituminous pavement rehabilitation costs with trucking industry benefits. Recommendations regarding the regulation of wide-base truck tires are presented.
This paper provides a summary of the findings on an ontario study focussing on the operational characteristics of wide-base tires and their impact on pavements. wide-base tires are compared to those of conventional dual tires in terms of their allowable load limits, inflation pressures and fuel economy. information for this part of the study was collected to a large extent from tire and trucking industry surveys. it is concluded that the operation of wide-base tires can be an economically feasible alternative in spite of their lower allowable load limits. a review of available literature indicates that without exception, wide-base tires are more damaging than conventional dual tires. depending on the criteria and method used, respective equivalent loads range from 44 to 7n kn versus the standards 80 kn axle load on conventional dual tires. for the covering abstract of the conference see irrd 807058.
Looks at the civil engineering and mechanical engineering aspects of the heavy vehicle/infrastructure system. The state of the art in research and implementation on issues such as highway geometry, traffic management, enforcement technologies and safety are reviewed.