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(rail transport) superimposed pair of railway crossovers, resembling a letter X, permitting to travel in either direction between a pair of parallel tracks
1916, Lee O. Kellogg, editor, Details of Practical Mining, page 458:
"In 15 is illustrated the diamond crossover, one of the many kinds in common use."
1955, L.T.C. Rolt, Red for Danger: A History of Railway Accidents and Railway Safety Precautions, page 104:
"It travelled on until the bogie fouled a diamond crossover at the north end of the station where derailment became complete."
1956, Robert William Abbett, American Civil Engineering Practice, page 2:
"Increased height is necessary when scales or a double hump lead with diamond crossover is placed on the descending slope of the hump."
1958, S. Kip Farrington, Railroads of the Hour, page 230:
"A diamond crossover provides each track with access to the entire yard."
1995, Institution of Civil Engineers (Great Britain), The Channel Tunnel, →ISBN, page 20:
"Each chamber contains a diamond crossover designed for 60 km/h running."
"The closed-deck ballasted bridge is double-tracked and opens up to a third track through a combination diamond-crossover and double-slip switch before it reaches the bulkhead on the Hoboken side."
2004 — U.S. Federal Register, v. 69 #101, May 25, 2004, p. 29780.
"The reason given for the proposed changes is that the crossover and switches were installed to replace a diamond crossover. The BNSF is taking their north connecting track out of service, so the control point with the crossover is no longer needed."
