United Kingdom Wye (rail)

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modified triangle @ grantham


in britain triangular layouts used turning locomotives result of junctions of 2 or more lines. there many examples, including 1 known maindee triangle in newport, south wales. here ex-gwr south wales mainline london swansea joined gwr line shrewsbury via hereford. significance of steam-hauled trains can run newport , engines turned using triangle. national grid location grid reference st316887. shrewsbury has triangular route formation used turn steam locomotives, , still available. triangle, grid reference sh294789, provided in 1989 adjacent transfer sidings wylfa nuclear power station, near valley on anglesey in wales. enables north wales coast line used steam hauled excursions. turntable @ holyhead has long been removed , area re-developed , sidings @ valley 4 miles (6.4 km) terminus nearest suitable site.


an unusual arrangement, unique in britain, constructed @ grantham. location grid reference sk914349 , shown on 1963 edition of os 1 inch 1 mile sheet 113. built in 1950s after turntable @ locomotive shed failed , expenditure on replacement no longer justified. locomotives requiring turned had travel barkston junction traverse triangular layout there (this mallard dynamometer car attached turned before starting out south on record-breaking run on 3 july 1938). journey barkston junction , time consuming business involving round trip of 8 miles (13 km) along busy east coast main line. authority given construct turning arrangement on strip of spare land west of main line, south of grantham station. there insufficient space conventional triangle overcome constructing inside-out triangle whereby approach tracks intersected in scissors crossing.







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