(a) Any person who, without malice aforethought, causes the death of another person through the violation of subsection (a) of Code Section 40-6-26 commits the offense of homicide by interference with an official traffic-control device or railroad sign or signal and, upon conviction thereof, shall be punished by imprisonment for not less than two nor more than 15 years.

(b) Any person who, without malice aforethought, causes bodily harm to another by depriving such other person of a member of his or her body, by rendering a member of his or her body useless, by seriously disfiguring his or her body or a member thereof, or by causing organic brain damage which renders the body or any member thereof useless through the violation of subsection (a) of Code Section 40-6-26 commits the offense of serious injury by interference with an official traffic-control device or railroad sign or signal and, upon conviction thereof, shall be punished by imprisonment for not less than one nor more than five years.