Show next Unit from Geofence?

Hi guys (and ladies)

i had today a presentation for a larger project and was fallen above a little question this customer has: is there any way to show "next unit" to a specific geofence?

For example: customer has for each of his customers/projects a geofence. Now customer is calling and he wants to see, which is next vehicle who can server the customer (of our customer). At the moment he need to go to tools, copy somewhere the adress of the customer and than he gets the info. (by the way, it would be cool to get a "routing time" for this! So not only "xx km" but also "xx minutes without traffic jam :-)))

Better would be like this: go to geofences, enter customer ID (name of geofence, example!) and click to something and it shows next vehicle.

Wolf.