It leaves the A479 at traffic lights and heads east along South Way. There's a shared space in the square between the Ibis Hotel and the station, then the road bears right to pass to the south of the stadium.
On the far side we reach a one-way loop. Westbound traffic continues along South Way whilst eastbound traffic detours north along First Way, passing a large car park, and then runs east along Fifth Way and south along Fourth Way, passing through an industrial estate.
After the two directions meet up once more, we cross the River Brent and then continue along Great Central Way to go over the railway line and reach traffic lights; this is the start of a rather spread-out junction with the A406. Turn left to pass Tesco and go under the North Circular, through what appears to be disused arches once used by trains. The road then loops slowly round to the right through an industrial estate to end at a LILO on the westbound A406. Traffic turning right at the traffic lights above doubles back along the railway line for a short distance before passing Ikea to end at traffic lights providing access to/from the eastbound A406.