The two routes of the Antonine Itinerary immediately following (' & ') list the stations from Londinium to "Portus Dubris" (Dover) and to "Portus Lemanis" (Lympne) at the north eastern edge of the Romney Marsh, suggesting that they may have been considered interchangeable terminuses. They only differ in the distance to Durovernum: 14 and 17 Roman miles, respectively. The route to Lemanis was sometimes distinguished by the name ; it now forms most of the B2068 road that runs from the M20 motorway to Canterbury. The route between Durovernum and the fortress and port at Regulbium (Reculver) on Kent's northern shore is not given in these itineraries but was also paved and is sometimes taken as a fourth terminus for Watling Street. The Sixth Route ("") also recorded an alternate path stopping at Tripontium (Newton and Biggin) between Venonis (High Cross) and Bannaventa (Norton); it is listed as taking 24 Roman miles rather than 17.