I think you might be thinking of the bottom of the Kinning Park slip road on the M8 at junction 21 (where you would come off eastbound to loop round and back on westbound to head down the M77.
There's an old railway cutting the other side of the roundabout which used to serve Mavisbank Quay and I'm sure ran some sort of train/tram service to the Garden Festival on the old tracks. |