what is a box junction on the road
Box junction A box junction is a road traffic control measure designed to prevent congestion and gridlock at junctions. The surface of the junction is typically marked with a criss-cross grid of diagonal painted lines (or only two lines crossing each other in the box), and vehicles may not enter the area so marked unless their exit from the junction is clear, or they are intending to turn right and are prevented from doing so by oncoming traffic, or other vehicles on the box waiting to turn right.