Section 4187 - Coasting prohibited(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.;