From the Wikipedia page
The Stonebridge Park is a junction at the intersection of North Circular Road (A406), and the A404, located in northwest London. The junction is located between Tokyngton to the west, and Stonebridge to the east.
Stonebridge Park Station is a local station, very nearby, and takes its name from this junction.
Buses that run through the junction include routes 18, 112, PR2 and N18.