Sometimes when hauling a load a second truck/driver needs to deliver the load. This can be caused by a truck break down, or just scheduling in a way that a second driver is used for a portion of the trip.
When you view the trip details there is a new button next to the edit button that says Split. This will open the form to create the split trip. After entering the details for the split and save, one trip will be split into two trips allowing you to dispatch and invoice correctly.
Note: This feature is only available for Pro users. It is not available on the Basic version.