Federal trucking regulators are reviewing a petition filed by the National Association of the Deaf seeking to relax requirements for deaf truck and bus drivers.

The petition specifically wants to end federal regulations that interstate commercial motor vehicle drivers must pass a medical evaluation demonstrating their ability to hear, and amend requirements that deaf drivers be able to speak and prohibit them from using interpreters during commercial driver license skills tests.

“NAD also contends that both the hearing requirement for physical qualification to operate a commercial vehicle and the speaking requirement are violations of the Rehabilitation Act of 1973,” said the Dec. 16 Federal Motor Carrier Safety Administration announcement seeking comments on the petition. The public comment period closed Feb. 14.

NAD has been pursuing the changes since at least 2017.

Under current requirements, for a driver to pass a hearing exam, the driver must “perceive a forced whispered voice in the better ear at not less than 5 feet with or without the use of a hearing aid,” according to FMCSA regulations.

To pass a test using an audiometric device, the driver can’t have an average hearing loss in the better ear greater than 40 decibels at 500 Hz, 1,000 Hz and 2,000 Hz — with or without a hearing aid.

The association’s petition alleges that the origins of the hearing requirements date to a “time of misguided stereotypes about the abilities and inabilities of deaf and hard of hearing individuals.”

If a driver fails the hearing exam, he or she can seek an FMCSA exemption. More than 450 deaf drivers with good driving records have been granted up to five-year exemptions by the agency.

Such large industry trade groups as American Trucking Associations, the Owner-Operator Independent Drivers Association, Commercial Vehicle Training Association, American Bus Association and American Association of Motor Vehicle Administrators filed comments in opposition to changing current regulatory requirements.

“While ATA believes the National Association of Deaf petition has merit, there are several concerns that FMCSA must address before any consideration to eliminate the hearing requirement for commercial motor vehicle operators,” ATA wrote. “These concerns involve a commercial driver license training, regulatory compliance, workplace safety, advisory board opposition, the lack of data currently available to assess crash risk and employers’ ability to make an individual assessment of driver applicants.”

ATA added, “Before FMCSA revises any safety standards, both the petitioner and FMCSA must provide the public with data-driven evidence that reflects real-world situations and adequately ensures safe CMV operation on our nation’s roadways.”

Although it opposed any changes for deaf drivers, OOIDA noted that in 2017 FMCSA analyzed the records of 218 CDL holders with hearing exemptions. The analysis showed that drivers with hearing exemptions had a lower crash rate than the national average, a lower violation rate than the control group and had fewer driver out-of-service violations, OOIDA said.

However, at the time, FMCSA acknowledged that the numbers involved in the comparison are small and that the agency will “endeavor to provide updated information as numbers grow.”