Probably barking up the wrong tree here as this is a busy rail / canal area bit is anyone local / familiar with this tunnel off Cleveden Road (save me the bother of an unnecessary trip). Seems to appear out of nowhere, heads north then goes under the Forth & Clyde canal then under Temple Road stopping short of the line from Knightswood South junction to Maryhill Station.
Recorded to the east of Cleveden Road there’s a disused rail tunnel that runs parallel to the canal and some dismantled rail sections but the tunnel highlighted intersects this route.
Unconnected but 350m west of here there’s also a tunnel recorded between the two gas tanks but the route of this is not shown