A transmitter transmits a signal to a receiver along a transmission path. The respective positions of the transmitter and the receiver are determined, and notice is received that a moving vehicle is proximate to the transmission path. Responsive to such notice, the moving vehicle position is determined, and such position is used with the transmitter and receiver positions to determine whether the moving vehicle is located between the transmitter and receiver positions. The calculated time delay is then used to provide a corrective signal component, which is employed to reduce degradation of the first component.