exactly follow what is known of the Roman route (the straightness of many long stretches is misleading). A section of the modern A2 from Rochester to the Roman settlement of Vagniacae, modern Springhead, is believed to roughly follow the Roman route. Borough to Shooter's Hill The A2 starts at Borough in Central London, at a junction with the A3, near the church of St George the Martyr. The remains of a small Roman temple was excavated at Tabard Square in 2003. The A2 at this point is named Great Dover Street, and is the only part of the A2 within the congestion charging zone. At the end of the road, it meets the London Inner Ring Road and becomes a primary route. The A2 heads along Old Kent Road towards New Cross, where the A20 breaks away. The A2 continues east through Deptford and Blackheath until it arrives at the Shooter's Hill Interchange with the A102 near Greenwich. A section of the Roman road has been identified running through Greenwich Park on an alignment with Vanbrugh Park. Shooter's Hill to Three Crutches At Shooter's Hill, Watling Street and the A2 part company, as Watling Street continues along the A207. At this point the A2 joins a dual carriageway, the Rochester Way Relief Road (the carriageways to the north of this junction being the A102 Blackwall Tunnel Approach) with a speed limit of 50 mph (80 km/h). The A2 meets traffic lights at Kidbrooke; this is the last set of traffic lights out of Greater London (the lights only apply to traffic turning right onto the A2213). Shortly after here, the A2 crosses the A205 South Circular Road and becomes a motorway in all but name, with 3 lanes and a hard shoulder in each direction. Within the London section the left hand lane is used for local traffic. At Falconwood, the road becomes the East Rochester Way – this point was once the westbound terminus of the dual carriageway. There are exits for Bexleyheath, Black Prince (at Bexley), and other south east London suburbs. Motorists should be aware that the section between the Blackwall Tunnel Approach and Dartford Heath is monitored using average speed cameras. Just before the A2 reaches the junction with the A2018, the speed limit increases to the national speed limit (70 mph, 112 km/h) as the road crosses the Greater London boundary to head eastwards into