As of May 21, 2014, the FMCSA requires interstate truckers and bus drivers to have their physical examinations done by certified medical examiners listed in the National Registry of Certified Medical Examiners. The Registry currently contains about 22,000 trained medical professionals, who are qualified to perform the examination.
The requirement aims to guarantee that commercial drivers are healthy and in good shape when performing their job. Certified examiners have an understanding of the DOT standards for fitness for this occupation, so they can make an adequate assessment of each driver. Ultimately, the purpose is to ensure higher safety on the road, which affects both commercial drivers and other travelers.
Certified medical professionals examine a range of health factors, such as respiratory and muscular functions, heart disease, hearing and vision. Commercial drivers must pass the examination every two years in order to operate legally.