The A102 is a road that starts in Clapton, east London, and ends by merging into the A2 road just south of the Sun in the Sands roundabout in Blackheath, south-east London. The A102 was formerly a continuous route including two motorway sections classified as the A102(M), but road renumbering means that it is separated into two sections linked by the A106 and the A12, one consisting of non-primary urban roads and the other a primary dual carriageway south of the river. The route includes the Blackwall Tunnel. From Wikipedia
