This odd-looking signal serves to warn motorists. Sherman Cahal Q What can you tell me about this signal? – Carl Lehman, San Antonio A The photo was taken along the Baltimore & Ohio’s line in Greenfield, Ohio, and faces Baltimore Avenue, which runs parallel to the tracks through the city. The single top light will […]
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		An eastbound express Metra train, operating in push mode, pauses at Western Springs, Ill., on Sept. 10, 2009. You can see the engineer in the window of the cabcar. Paul Hoffmann Q What’s the difference in touch or feel for an engineer running in push mode versus pull mode? Is there a limit to the […]
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		Duluth & Northeastern No. 14 fills up at Cloquet, Minn., in 1958. William D. Middleton Q How did railroads in northern states keep water in tanks from freezing in the winter? Were the tanks heated and insulated, or filled just before use? – James Alain, Chassell, Mich. A Many water towers in colder climates had […]
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		CN SD60Fs meet train 393 as they move eastward at Aldershot West, Burlington, Ont., on May 5, 2006. Greg McDonnell Q I recently saw Canadian National Railway diesel No. 5553 switching a cut of cars in Cedar Rapids, Iowa, and was unable to determine who built this locomotive. It had six axles and no running […]
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		Southern Pacific cab-forward 4-8-8-2 No. 4219 leads an extra train at Dunsmuir, Calif., in August 1948. Guy L. Dunscomb, Martin E. Hansen collection Q On some early Union Pacific and Southern Pacific steam and diesel locomotives there is an “X” in front of the number. Why is this done? – Leon Bassik, Langhorne, Pa. A […]
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		Q I heard the term “nitrogen blanket” in reference to a tank car. Could you explain what this is and what types of tank cars have these nitrogen blankets? – Mike Riley, Manchester, Mo. A The term “nitrogen blanket” refers to a padding (or a layer) of nitrogen gas put into a tank car to: […]
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		A sleeping berth shown set for feet first in the direction of travel on an Amtrak long-distance train. Bob Johnston Q I previously understood that the safest position to sleep while traveling by train was with feet first, but the past Amtrak trips I took had the bed set up head first. Is there an […]
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		Dots painted on trilevel auto racks indicate clearance heights. Rob Burnet Q I have seen colored painted dots on freight cars, mostly multilevel auto rack cars. What do they signify? – Rob Burnet, Etobicoke, Ont., Canada A Colored marks on auto multi-levels are to designate slightly different deck height clearances on trilevels. Orange dots indicate […]
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		On Aug. 6, 2012, a single Illinois Central manned helper locomotive brings up the rear of a southbound Canadian National intermodal train working up Byron Hill on the Waukesha Subdivision near Byron, Wis. Tom Danneman Q How do locomotive engineers know they are doing equal work on trains equipped with manned helpers? – Robert A. […]
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		Gene Mendonca’s painting of Ewbank Electric Transmission Co.’s train. Gene Mendonca Q Can you tell me anything about the Ewbank Electric Transmission Co. that is the subject of a picture I painted from a very old newspaper clipping? – Gene Mendonca, Folsom, Calif. A H.B. Ewbank Jr. built No. 333, a 75-foot-long gas-electric locomotive with […]
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		Sporting a red cab roof, Chicago, Burlington & Quincy 4-8-4 No. 5632 departs Chicago Union Station in spring 1962 with an excursion. The locomotive’s graphite smokebox and firebox are also readily apparent. Ed DeRouin, Barbara DeRouin collection Restored Denver & Rio Grande Western 2-8-0 No. 315 shows off its contrasting graphite smokebox. Martin E. Hansen […]
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		Bridge: A bridge comprising multiple span types crosses Swinomish Slough on BNSF Railway’s Anacortes Spur in Washington. Three photos, David Honan Q From the perspective of the railroads, what is the difference between bridges, trestles, and viaducts? – Ron Dutton, Los Angeles Viaduct: Union Pacific’s Joso Bridge carries the Ayer Subdivision over the Snake River […]
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