Dodge Durango Owner's Manual page 116

114 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
Entering From The Side
Vehicles that move into your adjacent lanes from either
side of the vehicle.
Side Monitoring
Entering From The Rear
Vehicles that come up from behind your vehicle on either
side and enter the rear detection zone with a relative
speed of less than 30 mph (48 km/h).
Rear Monitoring