The Munt la Schera Tunnel is a single lane road tunnel located in the Swiss canton of Graubünden. It connects the Engadin valley with Lago di Livigno, through Munt la Schera. Completed in 1965, the tunnel is 3,394 metres in length. The tunnel was built to transport building materials for the construction of the Punt dal Gall dam. It was opened for public use in 1968, but is still owned and operated by the hydroelectric power company Engadiner Kraftwerke AG. The tunnel is only wide enough for a single vehicle so traffic moves in alternate directions, controlled by traffic lights which change every 15 minutes.