A railroad track (Broad Gauge) in a mountainous area requires tight curves. The tightest curve has a radius of 900 feet. The height of the center of gravity of the railroad cars is 6 ft. [Note: For Broad gauge (5.5 ft), an effective gauge of 5.74 ft is used] a) To what height must the outside rail be raised if an equilibrium speed of 35 mph is to be maintained? b) If the railroad’s operating rules require that elevation be no more than 6 inches, what is the equilibrium speed? c) What is the comfortable speed? d) What is the overturning speed? e) What is the length of the transition spiral with the 6-inch elevation if the equilibrium

Structural Analysis
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Please solve this question .subject: Transportation engineering . Problem No.6 A railroad track (Broad Gauge) in a mountainous area requires tight curves. The tightest curve has a radius of 900 feet. The height of the center of gravity of the railroad cars is 6 ft. [Note: For Broad gauge (5.5 ft), an effective gauge of 5.74 ft is used] a) To what height must the outside rail be raised if an equilibrium speed of 35 mph is to be maintained? b) If the railroad’s operating rules require that elevation be no more than 6 inches, what is the equilibrium speed? c) What is the comfortable speed? d) What is the overturning speed? e) What is the length of the transition spiral with the 6-inch elevation if the equilibrium speed is used?
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