The A2 is a major road in the United Kingdom, connecting London with the English Channel port of Dover in Kent.
Turnpike Acts began to be passed by Parliament, as a result of which such roads were opened piecemeal: the section of what is now the A2 between Gravesend and Rochester was turnpiked in 1712; that between Chatham and Canterbury in 1730.
The road from there to Dover was not turnpiked until early in the 19th century, by which time it had become known as the Great Dover Road.
The A23 road, in its original form, was a major road running between London to Brighton, United Kingdom.
Much of the route follows that of the Roman road laid between Londinium and Chichester; from 1717, when the Turnpike Trust was set up, this was one of the major routes out of London for the stagecoaches.
Main roads running from the centre of London are always deemed to start from Charing Cross, although the A23 itself begins as Westminster Bridge Road near Waterloo station.