A21 road: Meaning (information, definition, explanation, facts)

The A21 is a major road in England. It runs south east from Lewisham in southeast London through Bromley and bypassing Orpington. Entering Kent near its junction with the M25 motorway, the road becomes a dual carriageway and continues past Sevenoaks, Tonbridge and Tunbridge Wells, then heads through Robertsbridge before terminating in Hastings, East Sussex.