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A vertical sag curve connects two tangents with grades -3% and +2% with the design speed...

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Civil Engineering

A vertical sag curve connects two tangents with grades -3% and+2% with the design speed of
100 km/h.
(a) Calculate the available sight distance and the length of thevertical curve using the minimum
flatness of curve that will satisfy the headlight criterion duringdark conditions. Assume the
height of the headlight above the pavement is 0.6 m and the angleof the light beam upward
from the axis of beam is 1ï‚°.
(a) Assuming that the length of the vertical curve is 75 m,calculate the available sight distance
and the maximum design speed (check for the requirements of i)minimum flatness of curve
for headlight and comfort criteria and ii) minimum stopping sightdistance for one-way road.
Assume 2.5 s for driver’s perception and reaction time.

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