To make use of zones for assigning jobs to your drivers:
When building routes, your jobs are automatically assigned to one of the drivers allocated to the zone in which the job is physically located. If a job is physically located outside any of your zones, the job is left unassigned. If a job was previously assigned to a driver, the job is unassigned as part of the process of building the route. We therefore recommend that you ensure all your jobs are assigned to a zone.
When assigning a job to a driver by manually or automatically assigning a job to a route, a violation can occur if the driver does not service the zone that the job is in. Jobs that are not part of any of your zones can be serviced by any of your drivers, whether the drivers are assigned to a zone or not. In this case you need to manually assign a driver to these jobs. Be aware that subsequently building routes containing these jobs will unassign the jobs from the driver.
If you have overlapping zones, jobs that fall into two zones are assigned to the more recently created zone.