Geograph - photograph every grid square

A box junction is a traffic control measure designed to prevent gridlock at busy road junctions. The surface of the junction is marked with a criss-cross grid of diagonal painted lines and vehicles may not enter the area so marked unless their exit from the junction is clear; drivers may enter the box and wait when they want to turn right and are stopped from doing so only by oncoming traffic or by other vehicles waiting to turn right. Link

The A117 runs 5 miles from Aldersbrook to the Woolwich Ferry, it once formed part of the North Circular Road. Link