The A298 is a short link road in south London. It did not exist in the original 1922 numbering plan, but is contemporary with the Kingston bypass, linking the bypass to Wimbledon.
Approaching London on the A3 at New Malden, a flyover gives access to the A298 (traffic from the other direction has to negotiate a set of traffic lights), and continues at elevation over West Barnes Lane (B282) and the parallel railway line to Epsom.
A set of traffic lights at the junction with the B279 Grand Drive (Raynes Park to Sutton) does not detain us long, and then we reach the junction with the A238 at Wimbledon Chase. Straight on is the A238, so this is the end of the A298.