Dodge 2013 Durango - Manual (Page 133)

The BSM system is designed not to issue an alert on
stationary objects such as guardrails, posts, walls, foliage,
berms, etc. However, occasionally the system may alert
on such objects. This is normal operation and your
vehicle does not require service.
Overtaking/Passing
Stationary Objects
3
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 131