Chapter 2 - Motion Along a Straight Line - Problems - Page 37: 76a

Constant velocity= (displacement) / (elapsed_time). Thus, for a vehicle traveling at a constant speed $v_{p}$ over a distance $D_{23},$ the time delay must be $t=D_{23} / v_{p}$

Constant velocity= (displacement) / (elapsed_time). Thus, for a vehicle traveling at a constant speed $v_{p}$ over a distance $D_{23},$ the time delay must be $t=D_{23} / v_{p}$