(a) The department shall continuously study and investigate the medical aspects of:
(1) the licensing of drivers;
(2) the enforcement of traffic safety laws, including differentiation between drivers who are ill or intoxicated; and
(3) accident investigation, including examination for alcohol or drugs in the bodies of persons killed in traffic accidents.
(b) Based on the studies and investigations, the department periodically shall recommend to the Department of Public Safety appropriate policies, standards, and procedures relating to those medical aspects.