The Blind Spot Information System with Cross Traffic Alert uses RADAR sensors to see vehicles that may be hidden in your blind spot. They’re situated on either side of your Mondeo and alert you with an orange light, clearly displayed in the side door mirror. And when reversing from a parking bay, Cross Traffic Alert assists you by detecting oncoming traffic (vehicles & bicycles) from either side of the vehicle. If sensors detect that the vehicle is reversing into the trajectory of oncoming traffic, it will alert the driver with an audible and visual warning.
Source: Ford