 The A1 road travels through East Lothian where it meets the Scottish Borders southbound and Edinburgh northbound.The A1 throughout East Lothian is dual carriageway and major junctions include Dunbar, Haddington, Tranent, Prestonpans and Musselburgh.Starting in Leith, the A199 road also travels through East Lothian beginning at Musselburgh and passing through Wallyford, Tranent, Macmerry and Haddington before joining the A1 in West Barns.