US Army Europe (USAREUR) Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!

The correct order for vehicles proceeding through a roundabout is determined by the rules of right-of-way and the direction of traffic flow. Vehicles already inside the roundabout have the right of way over those entering it. In this context, motorists must yield to traffic that is circulating in the roundabout before they can enter.

In the case of the order 3-1-2, it signifies that vehicle 3 is already within the roundabout and proceeding through it, making it the first to navigate the intersection. Meanwhile, vehicle 1 follows, indicating that it has yielded correctly to vehicle 3, and finally, vehicle 2, which is waiting to enter the roundabout, follows vehicle 1 once it’s safe to do so.

This sequence reflects the fundamental principle that those already in the roundabout continue moving while incoming vehicles must wait their turn, ensuring orderly and safe traffic flow. Understanding this hierarchy in vehicle movement is crucial for safe navigation through roundabouts, as it minimizes confusion and possible collisions.