United States Department of Transportation
i
Investigating the Safety and Training of Commercial Motor Vehicle Operation by Deaf and Hard of Hearing Drivers
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2024-11-01
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[PDF-1.71 MB]
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Edition:Final Report, September 2021–March 2023
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Abstract:The first objective of this project was to evaluate the literature to gain a better understanding of the safety implications of commercial motor vehicle (CMV) operations by deaf and hard of hearing drivers. The second objective was to identify and document procedures and recommendations that can be safely and effectively used to train and test deaf and hard of hearing CMV drivers. This was accomplished through an evaluation of the literature, a review of driving requirements, and expert interviews. Individuals who are deaf or hard of hearing may operate both passenger vehicles and CMVs in the United States and internationally; however, requirements vary and operation of CMVs in the United States is limited. There is limited literature on the safety and performance of drivers who are deaf or hard of hearing and no scholarly consensus as to whether deaf or hard of hearing drivers have a greater crash risk than drivers who are not deaf or hard of hearing drivers. Expert interviews further confirmed this finding. The driving school personnel reported reasonably addressable challenges in training deaf or hard of hearing students. These personnel largely agreed that after a period of trial and error while training their first deaf student, most of the process of training deaf students was not significantly different, longer, or more difficult than that of training students without hearing loss. The experts interviewed made recommendations to improve training of deaf and hard of hearing individuals and for driver and vehicle adaptations to assist deaf and hard of hearing individuals. None of the various sources included in the report provided clear evidence of increased crash risk associated with deaf or hard of hearing CMV drivers.
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