The Yalesville Underpass incorporates a roundabout, a traffic control device designed to improve safety and traffic flow. Unlike traditional intersections, roundabouts have a central island around which traffic circulates counter-clockwise. Drivers entering the roundabout must yield to pedestrians and traffic already within the circle. This design aims to reduce severe crashes by minimizing high-speed head-on and T-bone collisions.

However, the effectiveness of a roundabout relies on drivers understanding and adhering to its rules. Videos highlight that drivers unfamiliar with roundabouts, or those who disregard the rules, can create hazardous situations. It's crucial for all drivers to be educated on yielding, proper lane usage, and signaling when exiting the roundabout to ensure everyone's safety.