If you are using the appointment scheduling and want to track the time a drivers arrives and leaves to collect a load the you can use the check-in check-out functions. There are a couple of ways to check them in an out. One is via the list page in the windows client another option is via the mobile device. You can create an indirect menu item for driver check in and driver check out.
Here is a quick overview.
AX2012 R3 CU10.