A vertical summit curve has tangent grades of +2.8% and -1.6%. The curve will be designed such that a motorist whose eyesight is 1.5m above the roadway can sight the top of a visible object 100mm at the right side of the summit, at a distance of 130m. a. Calculate the length of the curve in meters. b. What is the required change in grade per 20m station? c. How much farther is the summit from P.C than P.T?
A vertical summit curve has tangent grades of +2.8% and -1.6%. The curve will be designed such that a motorist whose eyesight is 1.5m above the roadway can sight the top of a visible object 100mm at the right side of the summit, at a distance of 130m. a. Calculate the length of the curve in meters. b. What is the required change in grade per 20m station? c. How much farther is the summit from P.C than P.T?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![A vertical summit curve has tangent grades of +2.8% and -1.6%. The curve will be designed such that a motorist
whose eyesight is 1.5m above the roadway can sight the top of a visible object 100mm at the right side of the
summit, at a distance of 130m.
a. Calculate the length of the curve in meters.
b. What is the required change in grade per 20m station?
c. How much farther is the summit from P.C than P.T?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc3352868-1de7-4b36-b995-25b9c95237b4%2F03118547-20e5-4b73-881c-ac6cdb856679%2Fsns941s_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A vertical summit curve has tangent grades of +2.8% and -1.6%. The curve will be designed such that a motorist
whose eyesight is 1.5m above the roadway can sight the top of a visible object 100mm at the right side of the
summit, at a distance of 130m.
a. Calculate the length of the curve in meters.
b. What is the required change in grade per 20m station?
c. How much farther is the summit from P.C than P.T?
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