What is the correct action if two vehicles arrive at a roundabout simultaneously?

When two vehicles arrive at a roundabout simultaneously, the correct action is for the vehicle on the right to have the right of way. This rule is essential for ensuring a smooth flow of traffic and reducing the likelihood of accidents at roundabouts. The traffic control design of roundabouts operates on the principle that vehicles already circulating have the priority, but in the case of simultaneous arrival, the guideline is clear—vehicles must yield to those on their right. This helps to establish predictable traffic patterns and clarity in who should proceed, contributing to safer navigation through the roundabout.