The last ⅓ mile of the A703 into Peebles uses the line of the old Peebles Railway, from March Street down towards its junction with Innerleithen Road. The road goes through the site of the second station (Peebles East), which is marked with
a plaque at ground level and a cutout of a steam engine on the wall above. The ~150 yards on the approach to the Innerleithen Road roundabout more or less follows the line of the curve that linked the North British to the Caledonian station on the other side of the Tweed, rather then the NBR's extension of the line towards Galashiels.
I always keep an eye out for the station "memorial" when I'm passing that way, and for the
sole remaining railway building in the car park which now occupies the site of the NBR goods yard to the south.