For the cycle time (or tnet), the tnet values between daily trips time for trips 1 to 5 showed no significant difference (@ P < 0.05) between the trips (trips 1 to 5) on each day for each truck. That means that the tnet for each trips was specific to the truck, hence no significant variability per truck travel time. This suggests that the operators are conversant with their zonal routes layout, to reduce unchecked time at obstructions in the usual routes they plied in individual zones, and can create confidence in selecting zonal routes mean tnet as standard cycle times for the zonal routes.