This is part of the Borders Railway (Network Rail).
This short section of new line runs from Newcraighall South Junction (end of a short reversing spur from Newcraighall North Junction) south as a double track to King's Gate Points.
The line runs through the site of the Monktonhall Colliery and passes to the west of Millerhill and the largely closed Millerhill Marshalling Yard.
This is not the first re-alignment in this area. The Edinburgh and Dalkeith Railway was re-aligned on the opening of the Edinburgh and Hawick Railway (North British Railway). It could even be argued that the Edinburgh and Dalkeith Railway was a re-alignment of the Edmonston Waggonway built to carry coal from the Edmonston Colliery to a railhead at Little France, for Edinburgh.
The new route could equally be known as the Shawfair Deviation.
This short section of new line enabled the re-opening of the Borders Railway. In particular it provided a new crossing under the Edinburgh city Bypass as the solum of the original route was crossed on a long diagonal by the road.
These locations are along the line.
This is the northern end of a loop which runs south as far as King^s Gate Junction passing through Shawfair station.
This is a two platform station on the Millerhill Deviation (Network Rail), a new section of line required for the re-opening of the railway between Edinburgh (Newcraighall) and Tweedbank, south of Galashiels.
This location is not a true junction, but rather the site of a double track line becoming single on its way south. The north end of the loop is at Newcraighall South Junction (also not a true junction).
This short lived station replaced Sheriffhall [1st]. It was probably located to the south side of the A6106 overbridge and opened with the Edinburgh and Hawick Railway (North British Railway).