Final answer:
Roundabouts reduce the likelihood of t-bone and head-on collisions due to their design and traffic flow patterns.
Step-by-step explanation:
T-bone and head-on collisions are nearly eliminated completely in roundabouts due to the design and mechanics of roundabouts. Roundabouts require vehicles to enter at lower speeds and follow a circular path, which reduces the likelihood of severe collisions.
Unlike traditional intersections where vehicles cross paths directly, roundabouts force vehicles to enter at an angle, minimizing the risk of head-on collisions. Additionally, the circular design of roundabouts creates a natural flow of traffic, reducing the likelihood of T-bone collisions.