The A702 is a major road in Scotland, that runs from Edinburgh to St. John's Town of Dalry in Dumfries and Galloway. It is the last section of a sometimes recommended route^{[by whom?]} between London and Edinburgh, the English and Scottish capitals, which now follows the M1, M6, A74(M) and A702 roads, rather than the more direct A1 and A1(M) which runs all the way.

It starts as a primary route at the Tollcross junction in Edinburgh, and continues south until it meets the Edinburgh City Bypass (A720) on the city's outskirts. In the city is known as Home Street, Leven Street, Bruntsfield Place, Morningside Road, Comiston Road and finally Biggar Road. It continues in a south-westerly direction through the Pentland Hills to Biggar, before following the Clyde Valley. The route is a major commuter route for residents of Carlops, West Linton and Biggar who work in and around the Edinburgh area. The road passes through the attractive villages off Coulter and Lamington, before meeting the A73 road at a new roundabout junction, and then shortly afterwards meets junction 13 of the M74. From Abington, it continues as a non-primary route, and overlaps the A76 road for 1½ miles until Thornhill. From Thornhill, the road winds south-west still, through the village of Moniaive, until eventually reaching St. John's Town of Dalry. Here, it terminates at its junction with the A713 road.