The phrase "collision alert" means a warning system that lets you know if there is a risk of crashing into something or someone while driving. Full definition
Available safety features include forward collision alert with automatic emergency braking and pedestrian detection, lane - keep assist, blind - spot alert, and a 360 - degree camera system. (consumerguide.com)
The Driver Confidence 2 package (requires basic Driver Confidence package) adds forward collision alert with automatic braking, lane - keeping assist and adaptive headlights. (Autoweek.com)
I was surprised to find that our example was equipped with an optional adaptive cruise - control system and a forward collision alert system. (cnet.com)