Thank you both.
Here’s the scenario, main actor is a car reversing and stationary obstacles are assigned green, yellow and red based on distance from the approaching car. Originally tried to constantly measure the distance vector between the main actor (the car reversing) and stationary objects to assign them the color using 2 conditional nodes to change color from green to yellow and then to red. Each object was a static mesh actor and had to be assigned within the BP. As the the number of objects increased, things got hairy. Hoping I could use 2 concentric trigger volumes shaped in a cylinder moving with the car doing all the work to assign the color to any object in the scene. Objects can be actors or components, whatever would be the most simple to manage.