Along the 14km of the route, 12 bridges are being constructed with a combined length of 566 metres.
The biggest is the Edinburgh Park Station bridge which is 232m long, followed by the Water of Leith Bridge at 63m and the Haymarket viaduct at 55m.
The 43m-long South Gyle Access Bridge was lifted into place over the weekend of 3-6 August. This involved the setting up of lighting towers; installation of scaffolding, set up of a huge telescopic boom mobile crane; local road closure; delivery and installation of precast beams; and site clearance by 5am on Monday 6 August.
The lifting was carried out by the UK subsidiary of Belgian heavylift specialist Sarens.
Councillor Lesley Hinds, Transport Convener, said: "While work on these two bridges will continue in the weeks ahead we are now in a position where the basic structures have been put in place. I would like to thank local communities affected by the construction process for their continued patience."