When an administrator dispatches a driver to a specific location from the Samsara Dashboard, it will generate a new route and populate in Routes on the Driver App. From there, you can view the route created, then navigate to the Selected Map Location.
If a driver is already in the middle of a route and the administrator dispatched them to a Selected map location, it will show up as a new route in the Driver App for the driver to view and navigate there.
Below shows the Dispatched Route and then the Current Route. However, this may be different, depending on what time the administrator inputs for departing: