At the junction of the recently opened Clyde Gateway, or East End Regeneration Route, with London Road, near Celtic Park, Glasgow, the signs show London Road as A721, not A74.
To be more exact, it's shown as A721 going out of the city, and with no number going in.
Of course, there are lots of old signs in the area (and some in Carlisle) still mentioning the A74, but can we now assume that if all signage were brought into line with current concepts, there would be no A74 left anywhere?
That's not counting the A74(M), of course.
The signs on the M74 on both approaches to J2A, Fullarton Road, presumably designed within the last couple of years or so, still mention the A74, so the change, if it is a change, seems to be more recent than that.
Mmmm,The A74 number will not disappear forever if it was left up to Dfs&Galloway Council,In Dumfries town centre there are still plenty of roadsigns proudly displaying " A74 Glasgow 80 miles" . The council roads policy is not to replace a roadsign until it is completely knackered or has been demolished by an errant HGV.
Another interesting point is that when the "old" A74 trunk road was finally upgraded in the '90s a lot of the new directional signs on the A701 northwards out of town have an A74(M)plate riveted onto the main sign face underneath which reads "Glasgow , Edinburgh M6 ".