An ascending grade of 5% and descending grade of 4% are connected by a parabolic curve. A motorist passing on the curve and whose eyesight is 1.5 m above the pavement could just see the top of a visible object 130mm high at a horizontal distance of 160 m. Determine the length of the parabolic curve connecting the gradelines. a. 457.83 b. 425.48 c. 458.38 m d. 424.98

An ascending grade of 5% and descending grade of 4% are connected by a parabolic curve. A motorist passing on the curve and whose eyesight is 1.5 m above the pavement could just see the top of a visible object 130mm high at a horizontal distance of 160 m. Determine the length of the parabolic curve connecting the gradelines. a. 457.83 b. 425.48 c. 458.38 m d. 424.98

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 13P

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An ascending grade of 5% and descending grade of 4% are connected by a parabolic curve. A motorist passing on the curve and whose eyesight is 1.5 m above the pavement could just see the top of a visible object 130mm high at a horizontal distance of 160 m. Determine the length of the parabolic curve connecting the gradelines
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