(a) [Repealed.]

(b) No driver of a motor truck or motor bus, when traveling upon a downgrade, shall coast with the clutch disengaged. (Added 1971, No. 258 (Adj. Sess.), § 3, eff. March 1, 1973; amended 1997, No. 55, § 11(1), eff. June 26, 1997.)