​For commercial motor vehicle (CMV) drivers, the most important safety feature is YOU – the driver! Each time you turn the key, you are responsible for your own safety, as well as the safety of all the people who share the road with you. The physical qualification examination you take for your Medical Examiner’s Certificate, Form MCSA-5876, confirms that you are healthy enough to safely perform the demanding job of a CMV driver and keep our Nation’s roads safe.