Details:

Corporate Creators:
United States. Department of Transportation. Federal Motor Carrier Safety Administration
Subject/TRT Terms:
[+]
Commercial Vehicles Fatigue (Physiological Condition) Long Combination Vehicles Multi-unit Trucks Stress (Physiology) Stress (Psychology) Tractor Trailer Combinations Truck Drivers
Publication/ Report Number:
FMCSA-MCRT-00-012
DOI:
https://doi.org/10.21949/1502907
Resource Type:
Brief
TRIS Online Accession Number:
00796872
Corporate Publisher:
United States. Department of Transportation. Federal Motor Carrier Safety Administration
NTL Classification:
NTL-FREIGHT-Trucking Industry;NTL-SAFETY AND SECURITY-Highway Safety;
Abstract:
This Tech Brief summarizes the final report of a study by the same title, which was conducted as a part of a major program by the Federal Highway Administration to investigate commercial driver fatigue in commercial motor vehicle (CMV) operations. The study investigated the possibility that longer-combination vehicles (LCVs), with their increased length, greater weight, and greater number of trailers, could significantly increase the amount of stress and fatigue experienced by the driver. The study was limited to the issue of fatigue under proper and normal operating conditions; it was not intended as an investigation of the safety of these vehicles. Three general conclusions regarding configuration effects that can be drawn from the study results are: (1) Configurations and other task demands consistently affected performance, subjective workload, and fatigue/physiological state following a single, C-dolly, A-dolly (SCA) pattern. The A-dolly configuration resulted in the highest level of workload and fatigue, the C-dolly configuration resulted in the next highest level, and the single-trailer configuration resulted in the lowest level of workload and fatigue. (2) Driver differences were prominent in all analyses representing between 32% and 51% of the relative mean squares for lane-keeping and workload variables. The results indicate that some drivers are challenged by the driving task and support adoption of means to reduce this challenge, particularly when driving triples. (3) Configurations also have consistent carryover effects of physiological effects, driver subjective workload, and lane-keeping performance, and imply that triple-trailer drivers generally would be expected to maintain a higher probability of safe operation with the Super C-dolly configuration than with the standard A-dolly configuration.
Format:
PDF
Collection(s):
Federal Motor Carrier Safety Administration
Main Document Checksum:
[+]
urn:sha256:1ff2b41e1793506532581938b3ce92cc55a9a642ea2b2eafa93b9d7917da5070
Download URL:
https://rosap.ntl.bts.gov/view/dot/14282/dot_14282_DS1.pdf
File Type:

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