A. The approaching radius is valuable for generating e-mail notifications of a truck's pending arrival at a specific location. An example might be setting an approaching radius of 200 km from your border locations. You would then enter an internal e-mail address to receive e-mail notifications. The result will be that an individual or group would be notified approximately two hours prior to a truck's arrival at the border, giving them time to ensure that CBP or CBSA requirements have been met, thus mitigating any potential downtime after the truck arrives. Secondly, when the approaching radii have been breached that information is displayed in both the trip's Satellite Message Hisotry and on the Manage Stops window.