Haymarket Terrace is going to be closed to eastbound traffic for 6 months commencing Saturday 7th October.
The construction area goes from Magdela Cres. all the way along to the pedestrian crossing outside the station.
The eastbound diversion is up Magdela to Eglinton Crescent then down Palmerston Place. They are going to run it like this for a week to see how it goes but if it doesn't work well (particularly for the buses), instead of a right turn into Palmerston Place they will turn left then go round in a circle on Rothesay Place, Manor Place and Chester St.
Apparently there is "no room" for an eastbound cyclists' contraflow...
http://www.scottishwater.co.uk/investment-and-communities/your-community/haymarket-terrace