for tenders for the installation of a third rail for standard-gauge trains on the between Castellbisbal and the Can Tunis freight terminal in Barcelona. Sweden The bridges at the borders of Sweden and Finland, between Haparanda and Tornio have of dual gauge, and track. At each end of the dual-gauge section are yards with standard and Finnish gauge areas to allow for trans-shipment. Four rails are used because the gauges are close and the bridge structure is wider than normal to allow for the offset from the centreline of each gauge. A Rafil gauge changer is at the Tornio yard. Similar arrangements exist on the approach to Kaliningrad, where track extends from the Polish border with some sections of dual gauge. Between Västervik and Jenny, Sweden, there is a and dual-gauge line and dual-gauge track in the Västervik station area. Switzerland In Switzerland, dual-gauge track and track exists between Lucerne and Horw of the Zentralbahn, between Niederbipp and Oberbipp of the Oberaargau-Jura Railways and between Chur and Domat/Ems of RhB. All three allow narrow-gauge passenger trains and standard-gauge freight trains to operate. The former Zollikofen - Worblaufen - Deisswil dual gauge was cut back to Papiermühle, when the factory in Deisswil closed. United Kingdom The Great Western Railway in Britain was originally built to a broad gauge of 2134 mm (7 ft 0 in), subsequently widened to 2140 mm (7 ft 0 in). After a "gauge war", the gauge was converted to . A dual-gauge system was easily installed as the gauges were well separated and the line had wooden sleepers. A short section of broad and standard gauge is at the Great Western Society site at Didcot. The port authority in Derry, Northern Ireland used a dual-gauge line in a street-level network to transfer freight. Two of the city's stations were on a narrow gauge. The other two city stations were on broad gauge. United States In Los Angeles, the Los Angeles Railway and Pacific Electric Railway ran on dual gauge track on some downtown streets. From 1880 to 1902, the Burlington, Cedar Rapids and Northern Railway (standard gauge) and the Burlington and Northwestern Railway (narrow gauge) shared a dual-gauge mainline from Burlington, Iowa to Mediapolis, to the north. The early operational years of the State Belt Railroad in San Francisco featured dual-gauge tracks to accommodate regional railroads of the time, which interchanged via ferry. Until 1941, the Colorado