Question

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

Answer #1

Determine the minimum length of the vertical curve if the grades
are -4.0% and +2.0% and the design speed is 70 mi/h

A vertical crest curve on a single carriageway road with a
design speed of 100km/h is to be built in order to join as
ascending grade of 3% with a descending grade of 3%. The motorist’s
eye height is assumed to be 1.05m while the object height is
assumed to be 0.26m. 1. Calculate the minimum curve length required
in order to satisfy the requirement of minimum sight stopping
distance. 2. Recalculate the minimum curve length with the object
height...

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)

An equal-tangent crest vertical curve is being designed for a
speed of 55 mph. The curve connects grades of 2% and -3.5% in the
direction of interest. The curve high point is at station 110+00
and has an elevation of 500 ft. What is the station and elevation
of the PVC and the PVI?

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

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 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

An equal-tangent crest vertical curve is 1919.200m long and
connects a +2.5%and –1.5%grade. If the design speed of the roadway
is 88.5 kph, does this curve have adequate passing-sight
distance?

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

3.40 A crest and sag curve connect a 0% west highway
segment (left) with a +2% east highway segment
(right). The 0% west highway segment is at a higher
elevation than the start of the +2% east highway
segment. The two vertical curves connect with each
other (PVTc = PVCs) and share a 3% common grade.
If the design speed of the curves is 45 mi/h, what is the
elevation difference between the two road segments?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 18 minutes ago

asked 45 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago