Rear Cross Path (RCP)
RCP is designed to assist the driver when backing out of parking spaces where their view of oncoming vehicles may be blocked. Proceed slowly and carefully backing out of the parking space until the rear of the vehicle is open. The RCP system will then have a clear view of the intersection, and if an oncoming vehicle is detected, it will alert the driver.

RCP Detection Zones
RCP monitors the rear detection zones on both sides of the vehicle for objects moving toward the vehicle at a minimum speed of approximately 3 mph (5 km/h), and objects moving at a maximum of approximately 32 km/h, such as in parking lot situations.
When RCP is enabled and the vehicle is in REVERSE, the driver is alerted by both visual and audible signals, including a reduction in radio volume.
NOTE:
In parking lots, oncoming vehicles may be blocked by vehicles parked on both sides. If the sensors are blocked by other structures or vehicles, the system will not be able to alert the driver.
Test yourself
A quick Jeep Wrangler quiz: every answer comes with an explanation and a link to the manual page.