When you join a dual carriageway, what is the usual course of action?

When joining a dual carriageway, the usual course of action is to keep in the left lane. This approach is rooted in the design and intended flow of traffic on dual carriageways. The left lane is typically where vehicles enter and merge into the existing traffic. It allows for a smoother integration into the faster-moving vehicles in the right lane, which is often designated as the overtaking lane.

This method helps maintain a steady flow of traffic and minimizes disruption for vehicles already traveling on the dual carriageway. By starting in the left lane, drivers can gradually gauge the speed of the traffic and find a suitable gap to merge safely.

Driving in the right lane upon entry can lead to potential disruptions and increase the risk of accidents since it does not align with standard lane discipline. Rapid acceleration, while important for merging when necessary, should be done cautiously and in consideration of other road users. Stopping before merging is generally not advisable on a dual carriageway as it can create hazards and disrupt the flow of traffic.