A green sign with a diagram showing an exit branching off the road ahead and the following text.
Forward destinations: Berwick; upon Tweed A1 .
Exit destinations: City Bypass; Forth Road; Bridge (A90) Glasgow (M8); Stirling; (M9); A720.
Junction name: OLD CRAIGHALL.
Change Route: A720 Edinburgh City Bypass
The City Bypass links the A1 to the rest of Scotland's trunk roads - if you want the M8, M9 or points north, they are all found this way. Or you can stick with the A1 for the journey south.