3. A curve of radius 250 ft and e= 0.08 is located at a section of an existing rural highway, which restricts the safe speed at this section of the highway to 50% of the design speed. This drastic reduction of safe speed resulted in a high crash rate at this section. To reduce the crash rate, a new alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if the safe speed should be increased to the design speed of the highway. Assume fs=0.17 for the existing curve, and the new curve is to be designed with e = 0.08.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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3. A curve of radius 250 ft and e= 0.08 is located at a section of an existing rural highway, which
restricts the safe speed at this section of the highway to 50% of the design speed. This drastic
reduction of safe speed resulted in a high crash rate at this section. To reduce the crash rate, a new
alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if
the safe speed should be increased to the design speed of the highway. Assume fs=0.17 for the
existing curve, and the new curve is to be designed with e = 0.08.
4. A driver on a level two-lane highway observes a truck completely blocking the highway. The driver
was able to ston her vehicle onhy 20 fe from the truck If the driver was driving at 60 mi/h, how far was
Transcribed Image Text:3. A curve of radius 250 ft and e= 0.08 is located at a section of an existing rural highway, which restricts the safe speed at this section of the highway to 50% of the design speed. This drastic reduction of safe speed resulted in a high crash rate at this section. To reduce the crash rate, a new alignment is to be designed with a horizontal curve. Determine the minimum radius of this curve if the safe speed should be increased to the design speed of the highway. Assume fs=0.17 for the existing curve, and the new curve is to be designed with e = 0.08. 4. A driver on a level two-lane highway observes a truck completely blocking the highway. The driver was able to ston her vehicle onhy 20 fe from the truck If the driver was driving at 60 mi/h, how far was
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