Question

A
vertical curve is joining -4% with -2% gradient, determine the
minimum length of the curve using all applicable criteria. Speed on
the curve will be 60mph. Also, find out elevations of intermediate
stations on the curve for layout. The PVI is at station 31+50 and
elevation 101ft. (using K-values to find the curve length)

Answer #1

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Problem #4: Vertical curve
A vertical curve is define by gradient lines. The gradient of
the back tangent is +4.2% and the
gradient of the forward tangent is -3.75%. The BVC station is at
45+00 and has an elevation of
215.00 feet. For a vertical curve with a length of 12 stations,
determine the following:
a. The station and elevation of the PVI.
b. The station and elevation of the EVC.
c. The elevation of the vertical curve at station...

.A crest vertical curve joining a +3 percent and a-4 percent
grade is to be designed for 40 Km/h. If the tangents intersect at
station (K20+ 60.00) at an elevation of 200 m, determine the
stations and elevations of the BVC and EVC. Also, calculate the
elevations of intermediate points on the curve at the whole
stations.

Determine the minimum length of a vertical curve necessary for
it to be adequate, under the visibility criteria for braking, for a
design speed of 80 mph. The slopes corresponding to the PVC and PVT
of the curve in question are 4% and -3% respectively. the PVI
station is 120 + 70 and its elevation is 810 meters. The
coefficient of lateral friction is 0.08. All circular curves in the
segment under study have been designed using an 8% superelevation...

a sag vertical curve joining -3.5%and a 1.5% grades the point of
curve PC station is 188 ft with an elevation of 175 ft assume K
value for this highway is 180 determine the minimum length of the
curve L determine the station of the endpoint of the curve PT
determine the elevation of the point of intersection PL

a vertical curve joining 2.5% and a -3.5% grades.the point of
curve (pc) station is (235.2)ft with an elevation of 170 ft assume
k value for this highway is 280 determine the minimum length of the
curve (L) determine the elevation of the point of intersection (pi)
determine the station of the point of intersection (pi)

Determine the elevations for each standard station between PVC
and PVT from a vertical curve connecting a 3% slope to a -5% slope.
The PVC and PVT stations are 112 + 22 and 119 + 64, respectively.
The elevation of the PVI is 1235 feet.

An unequal tangent vertical curve has the following elements:
g1=-3.25%, g2=1.75%, total length = 500.00’, length of curve 1 is
150’, length of curve 2 is 350’, PVI station is 12+00, PVI
elevation is 275.00’
Using the vertical curve, what is the station and elevation of
the high/low point of the curve?

A crest vertical curve joining a +3 percent and a -4 percent
grade is to be designed with a length of 2184 ft and the Station of
BVC is ( 334 + 68) at an elevation of 217.24 ft. The distance from
BVC at station (339 + :00) is

Determine the
minimum length of a crest vertical curve if the grades are (+4%)
and (-2%).
Assume
design speed is 70 mi/h, a =11.2 ft /sec2, perception-reaction time
= 2.5 sec

Determine the minimum length of a sag vertical curve between
-0.9% grade and a +0.6% grade for a road with a 130km/hr design
speed. The curve must provide 250m stopping SD and meet the
California Appearance Criteria and the AASHTO Comfort Standard.
Please show all steps, Thank you

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