A highway has a posted speed limit of 50mph and, on one section, has both horizontal and vertical curves, as shown in the following Figure. A recent daytime crash (driver traveling and striking a stationary roadway object) resulted in a fatality and a lawsuit alleging that the speed limit is an unsafe speed for the curves. 1) Evaluate if the roadway design (horizontal and vertical curves) is reasonable as compared to the minimum curve length requirement due to sight distance. 2) Based on the above calculations, comment if the roadway design is the cause of this crash. Plane view Profile view PC=16+00 G1= -2% 24ft Sight obstruction 80⁰ PVC = 14+00 e= 8% PT=32+75 G2= +4% PVT=18+80 N
A highway has a posted speed limit of 50mph and, on one section, has both horizontal and vertical curves, as shown in the following Figure. A recent daytime crash (driver traveling and striking a stationary roadway object) resulted in a fatality and a lawsuit alleging that the speed limit is an unsafe speed for the curves. 1) Evaluate if the roadway design (horizontal and vertical curves) is reasonable as compared to the minimum curve length requirement due to sight distance. 2) Based on the above calculations, comment if the roadway design is the cause of this crash. Plane view Profile view PC=16+00 G1= -2% 24ft Sight obstruction 80⁰ PVC = 14+00 e= 8% PT=32+75 G2= +4% PVT=18+80 N
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A highway has a posted speed limit of 50mph and, on one section, has both horizontal and
vertical curves, as shown in the following Figure. A recent daytime crash (driver traveling and
striking a stationary roadway object) resulted in a fatality and a lawsuit alleging that the speed
limit is an unsafe speed for the curves.
1) Evaluate if the roadway design (horizontal and vertical curves) is reasonable as compared to
the minimum curve length requirement due to sight distance.
2) Based on the above calculations, comment if the roadway design is the cause of this crash.
Plane view
Profile view
PC=16+00
Gl= -2%
24ft
Sight
obstruction
80⁰
PVC = 14+00
e= 8%
PT=32+75
G2= + 4%
PVT=18+80
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