Waypoint insertion with delays.

A waypoint that is inserted in which the start time is not the arrival time the delays are not properly accounted.

The first error is where it says that the duration is from the original start time, not the arrival time at the waypoint.

The second error is that the final destination arrival time does not change. Instead it is just the summation of the trip time, as if the waypoint doesn't exist.

The reasonably correct arrival time is the basis of a “route planner”.