When entering a roundabout, to whom must you give way?

When entering a roundabout, the correct approach is to give way to all vehicles already in the roundabout. This rule ensures that traffic flow is maintained smoothly and safely, as vehicles within the roundabout have the right of way.

The rationale behind this is based on the design and purpose of roundabouts, which is to minimize conflict points and allow for continuous movement. By yielding to vehicles already in the roundabout, you prevent potential collisions and ensure that all drivers can navigate the circular intersection safely.

Other options suggest giving way only to vehicles on one side or none at all, which would create confusion and disrupt the orderly functioning of the roundabout. In summary, yielding to all vehicles already in the roundabout promotes efficiency and safety for all road users.