(a) The driver of any motor vehicle when traveling upon a down grade shall not coast with the gears or transmission of such vehicle in neutral.

(b) The driver of any motor vehicle when traveling upon a down grade shall not coast with the clutch disengaged.

21 Del. C. 1953, § ?4184; 54 Del. Laws, c. 160, § ?1; 60 Del. Laws, c. 701, § ?56;