Citation

Millar DS, Walton CM. Transp. Res. Rec. 1985; 1026: 62-65.

Copyright

(Copyright © 1985, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

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.

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

Language: en

Keywords

MATHEMATICAL MODELS; VEHICLES; TRANSPORTATION - Legislation