I recently purchased a 16ch mini NVR and I'm actually still in the install phase.  I planned to establish alert triggers based on motion in driveway.  In order to 'capture a complete vehicle parked at the end of the driveway' the view extends to the street where you see cross traffic auto and pedestrian activity, which I don’t want to set off an alert.  This would be camera "A"

Would anyone have a recommendation for having a separate device (alternate camera or otherwise "B") that would only capture motion to near the edge of my driveway, but capture and send the full image from "A"?

I'm open to ideas... I want to be alerted when motion is detected in my driveway only, but if possible I want to capture a full image of what might be at the end of my driveway.  The only solution I can think of is to install another camera with a limited view, have it trigger the alert and rely on the existing camera to capture the full view for viewing later if necessary.