00457194

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http://onlinepubs.trb.org...trr/1985/1026/1026-008.pdf

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

Recent legislative enactments at all government levels have resulted in increases in trucks and tractor-trailer combinations. Sectiion 138/415 of the Surface Transportation Assistance Act of 1982 called for a feasibility study of a national intercity truck route network for commercial vehicles up to 110 ft long. Naturally, these changes in overall vehicle size will have an impact on highways and their operations, especially on roads with restrictive geometrics. To assess the vehicle to operate, one characteristic, its offtracking, must be evaluated. Several studies involving offtracking are reviewed, and it is noted that there is a need for additional study of the problems associated with very long combination vehicles. The offtracking characteristics of very long vehicles, as well as those of less extreme vehicles, are described. Two methods of measuring offtracking are used, mathematical formulation and an adjustable scale model. Curves that illustrate vehicle offtracking paths were produced with the model. The formula was used to compute and compare the maximum offtracking of the vehicles studied. The results are tabulated and sample templates provided.

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. Publication of this paper sponsored by Committee on Operational Effects of Geometrics.

00495308

HS-039 599

pp 62-65

1985

Transportation Research Record

0309039169

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Figures (2) ; References (5) ; Tables (2)

Commercial vehicles; Feasibility analysis; Heavy vehicles; Offtracking; Tractor trailer combinations; Truck routes

Design; Highways; Maintenance and Preservation; Motor Carriers; Operations and Traffic Management; Vehicles and Equipment; I61: Equipment and Maintenance Methods

TRIS, TRB

Aug 31 1990 12:00AM

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