Jeep Grand Cherokee 2013 Owner's Manual page 139

The BSM system will not alert you of objects that are
traveling in the opposite direction of the vehicle in
adjacent lanes.
Opposing Traffic
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 137
WARNING!
The Blind Spot Monitoring system is only an aid to
help detect objects in the blind spot zones. The BSM
system is not designed to detect pedestrians, bicy-
clists, or animals. Even if your vehicle is equipped
with the BSM system, always check your vehicles
mirrors, glance over your shoulder, and use your turn
signal before changing lanes. Failure to do so can
result in serious injury or death.
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