What are box junctions designed to prevent?

Box junctions are specifically designed to prevent congestion and gridlock at busy intersections. They serve as a traffic management tool that ensures vehicles do not block the intersection when they cannot proceed through it due to traffic conditions. When the designated box is kept clear, it allows for smooth flow not only for vehicles waiting to turn but also for those moving through, reducing the risk of stoppage and delays in traffic.

Maintaining clear box junctions improves overall traffic efficiency and safety, as it allows for better navigation through complex intersections where multiple roads converge. By preventing vehicles from entering these junctions when they cannot clear them, box junctions help maintain order and reduce the likelihood of collisions or traffic jams that could accumulate if vehicles were allowed to remain stuck.