We've added a new feature that monitors for new orders matching a custom set of filters, and automatically pre-selects them for addition to an existing route. You can enable the Route Assistant from the Add Orders tab on any new or existing route, directly from the Auto-add orders box found below the map:
Once enabled, the Route Assistant will place a banner at the top of a route page whenever you load an unstarted route and new orders are available - simply head to the Add Orders tab and they'll be staged on the map ready for you to view and quickly add to your route:
For more details on configuring and updating the Route Assistant's functionality and filters, take a look at the support article for this new feature.