A 5º73' simple curve having a central angle of 57037' is situated along the steep side of Mount Krokat. www Recently, a number of complaints about the peculiar driving experience has been raised, in a way that the road users encounter shock due to sudden change of steering maneuver along the curve and strong sidesway due to high centrifugal force. To address this, the district engineering office proposed a solution by introducing transition (spiral) curves on both ends of the new curve with the following conditions: •The radius of the old curve will be retained; however, outside parts of the curve will be eliminated, and •Old tangents will be moved outward by 2.77 meter-offset distance to accommodate transition curves. Determine the following: Design speed in kph if the maximum superelevation imposed along the curve is 7% m/m. Design length of the spiral curves. Express your answer in multiples of 10 meters. Station of spiral to circular curve (SC) if the Station of the Point of Intersection of new I. I. III. tangents is 81+770. The central angle of the new simple curve. Distance along the tangent at midpoint of the spiral. IV. V.
A 5º73' simple curve having a central angle of 57037' is situated along the steep side of Mount Krokat. www Recently, a number of complaints about the peculiar driving experience has been raised, in a way that the road users encounter shock due to sudden change of steering maneuver along the curve and strong sidesway due to high centrifugal force. To address this, the district engineering office proposed a solution by introducing transition (spiral) curves on both ends of the new curve with the following conditions: •The radius of the old curve will be retained; however, outside parts of the curve will be eliminated, and •Old tangents will be moved outward by 2.77 meter-offset distance to accommodate transition curves. Determine the following: Design speed in kph if the maximum superelevation imposed along the curve is 7% m/m. Design length of the spiral curves. Express your answer in multiples of 10 meters. Station of spiral to circular curve (SC) if the Station of the Point of Intersection of new I. I. III. tangents is 81+770. The central angle of the new simple curve. Distance along the tangent at midpoint of the spiral. IV. V.
Chapter2: Loads On Structures
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Transcribed Image Text:A 5°73' simple curve having a central angle of 57°37' is situated along the steep side of Mount Krokat.
Recently, a number of complaints about the peculiar driving experience has been raised, in a way that
the road users encounter shock due to sudden change of steering maneuver along the curve and strong
sidesway due to high centrifugal force. To address this, the district engineering office proposed a
solution by introducing transition (spiral) curves on both ends of the new curve with the following
conditions:
•The radius of the old curve will be retained; however, outside parts of the curve will be
eliminated, and
•Old tangents will be moved outward by 2.77 meter-offset distance to accommodate transition
curves.
Determine the following:
I.
Design speed in kph if the maximum superelevation imposed along the curve is 7% m/m.
Design length of the spiral curves. Express your answer in multiples of 10 meters.
Station of spiral to circular curve (SC) if the Station of the Point of Intersection of new
II.
III.
tangents is 81+770.
The central angle of the new simple curve.
IV.
V.
Distance along the tangent at midpoint of the spiral.
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