Clyde Tunnel in Glasgow closed for training exercise
Diversions in place as emergency services take part in 'integral and important' exercise.
Glasgow's Clyde Tunnel was closed on Thursday evening as emergency services conducted a major training exercise.
Police, the fire service and ambulance crews all took part in the exercise, which involved a simulated accident in the tunnel linking Govan to Whiteinch.
Drivers have been advised to seek alternative routes and diversions have been signposted on nearby streets.
The tunnel will be open as usual on Friday.
A police spokesman said: "This live play exercise is an integral and important part of our training.
"It will not impact the local communities or any of the services involved."
The exercise caused congestion to build up along the diversion routes.
Drivers travelling north experienced long delays from the M8 westbound at junction 25 through to Govan Road and along to the Clyde Arc.
Northbound traffic on the A739 from Cardonald roundabout was also affected, according to Glasgow Council's Traffcom service.
The exercise concluded shortly before 10pm on Thursday evening and the tunnel was reopened to all traffic soon after.