Question

A reverse curve is to be used as an exit ramp for a high speed highway onto a parallel highway. The distance for the transition is to be 9003 ft. The lanes on the high speed and parallel highways are 675 ft apart. If the low speed radius is 63% of the high speed radius, find the central angle and degree of curve for each of the curves involved.

Answer #1

A two-lane highway with a design speed of 106.7 km/h
requires a transition curve for a horizontal curve of 550 m radius.
The curve is used to connect the tangents that form an external
angle of 24 degree. The lanes of the highway are 3.65 m wide and
the coefficient of side friction for this design speed is 0.11. The
change of grade between the centreline and the edge (i.e. Δg) is
limited to 1 over 250 for comfort.
Calculate...

A reverse curve is being designed to join two roadways whose
centerlines are parallel and 72 ft apart. The two simple circular
curve components are identical. The line connecting points x and y
in the figure is 500 ft long; line x-y is tangent to the curves at
the PRC. The station of the PI1 for the first component curve
(point x) is 23+45.67
Determine:
The central angle of each component curve
The length of each component curve...

A horizontal curve on a three-lane highway with 12-ft lanes has
a PC located at station 10+00 and PT at station 13+70. The central
angle is 25 degrees, the superelevation is 4%, and 40 ft of
clearance is available between an obstruction and the centerline.
Determine the maximum safe design speed to the nearest 5 mph.

A section of a roadway has a horizontal curve with
superelevation of 6% and central angle of 40o. The
design speed of the section is 60 mph. There are two lanes on the
curve, each 12 ft wide. Determine:
(a) The degree of the curve.
(b) The length of the curve.
(c) The minimum distance of an obstruction from the centerline
of the innermost lane.

1. A horizontal curve on a two-lane highway is designed with a
2000 ft radius, 12 ft lanes, and 60mph design speed. Determine the
distance that must be cleared from the inside edge of the inside
lane to provide a sufficient stopping sight distance.
2, A flexible pavement is constructed with 102 mm (4 inches) of
hot mix asphalt (HMA) wearing surface, 203 mm (8 inches) of
emulsion/aggregate-bituminous base, and 203 mm (8 inches) of
crushed stone subbase. The subgrade...

What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
Blaine, a seaport town in northwest
Washington state.
Meanwhile, several members of...

Delta airlines case study
Global strategy. Describe the current global
strategy and provide evidence about how the firms resources
incompetencies support the given pressures regarding costs and
local responsiveness. Describe entry modes have they usually used,
and whether they are appropriate for the given strategy. Any key
issues in their global strategy?
casestudy:
Atlanta, June 17, 2014. Sea of Delta employees and their
families swarmed between food trucks, amusement park booths, and
entertainment venues that were scattered throughout what would...

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