On what type of road can you safely overtake on the left at a roundabout?

Overtaking on the left at a roundabout is permissible on a one-way road. This is primarily because vehicles traveling in a one-way system are moving in the same direction, allowing for safe maneuverability without the risk of conflicting with oncoming traffic. In a one-way scenario, overtaking on the left fits within the expected flow of traffic, minimizing the chances of collisions that would arise in situations where vehicles approach from opposite directions, such as on a two-way road or a highway.

Understanding the nuances of road types is vital for safe driving practices, especially around roundabouts, where the layout and flow of traffic can often dictate how overtaking should be approached. The other road types may introduce complexities or risks that are not present on a one-way road, hence why overtaking on the left is not typically advised in those situations.