The A406 runs on purpose-built road to the north of Hanger Lane Gyratory, and is referred to as "North Circular Road" on street signs. The road is a six-lane dual carriageway that connects the industrial estates in the area, and passes beneath the West Coast Main Line near Stonebridge Park. Beyond this, there is a junction with IKEA and the Neasden temple to the south-east, and the road runs across empty land past the Welsh Harp Reservoir. Beyond the reservoir, there is a large interchange with the Edgware Road (A5) and junction 1 of the M1 motorway at Staples Corner, and a junction for the Brent Cross Shopping Centre at the Brent Cross Interchange (joining the A41 from Finchley). This section of the North Circular was used for filming the car chasing sequences in "Withnail and I".