travel through the tunnel. The pedestrian tunnel also had its years of graffiti removed as part of a beautification project, but it was often redone soon after being removed. Breath holding A popular game amongst local children, and some adults, is attempting to hold one's breath for the duration of the journey by motorized vehicle through the Clyde Tunnel. This is possible due to the short length of the tunnel – a car travelling at the limit takes 57 seconds to pass through, and at off peak times traffic is often flowing at around , resulting in a transit duration of 42 seconds. Success is hampered by snarlups (particularly at the interchange on the north end) slowing traffic. The breath-holding game was the subject of Scottish artist Roderick Buchanan's video Gobstopper, for which he won the Beck's Futures art prize in 2000. References External links Glasgow Motorway Archive - Clyde Tunnel and Approaches Clyde Tunnel page on the Glasgow City Council website The Hold Your Breath project Tunnels in Scotland Transport in Glasgow River Clyde Tunnels completed in 1963 Govan Partick Road tunnels in the United Kingdom Cycling tunnels in the United Kingdom