Description : Trapezoidal speed-time curve is (A) an exact representation of the conditions in Main-line traction service. (B) an exact representation of the conditions in Suburban traction service. (C) ... in Suburban traction service. (D) a close approximation of the conditions in Mainline traction service.
Last Answer : Trapezoidal speed-time curve is a close approximation of the conditions in Mainline traction service.