Including stoppage time in Apple Maps multiple stops.

I frequently create journeys with multiple stops in Apple Maps. To make the total journey time realistic I need to be able to include the estimated length of time that I will be at each stop. For example, it may take two hours to reach my first stop and will be there for 30 minutes before continuing on to the second stop which may be a further one hour. Therefore, the total journey time is three hours 30 minutes but Apple Maps currently says it will only be three hours. How do I get Maps to include the 30 minutes that I will be at the first stop?