Geofences API
A Geofence is bounding box around a geographic area. Geofences can be defined by a perimeter polygon or by a circular radius around a center point. The Point Intersection API can be used to identify if a vehicle is inside of a geofence, and the Route Intersection API can be used to determine if a route is going to pass through a geofence.
Please see the Sites feature in our Places API if you are looking for predefined geofences around warehouses, distribution centers, and many other important trucking facilities in North America.