A westbound section of freeway currently has three 12-ft wide lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream and downstream of the segment midpoint. It is on rolling terrain with 10% heavy vehicles and is operating at capacity with a peak-hour factor of 0.9. If the road is expanded to five 11-foot lanes with a 2- foot right shoulder, and traffic after the expansion is projected to increase by 5% with the same heavy vehicle percentage and peak-hour factor. What is the LOS and estimated density BEFORE and AFTER expansion? Before expansion: Density = 44.46 LOS = E After expansion: New Density = 26.67 New LOS = D
A westbound section of freeway currently has three 12-ft wide lanes, a 6-ft right shoulder, and no ramps within 3 miles upstream and downstream of the segment midpoint. It is on rolling terrain with 10% heavy vehicles and is operating at capacity with a peak-hour factor of 0.9. If the road is expanded to five 11-foot lanes with a 2- foot right shoulder, and traffic after the expansion is projected to increase by 5% with the same heavy vehicle percentage and peak-hour factor. What is the LOS and estimated density BEFORE and AFTER expansion? Before expansion: Density = 44.46 LOS = E After expansion: New Density = 26.67 New LOS = D
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Please help. My answers for Before the expansion are correct but both answers After the expansion were marked wrong.
Transcribed Image Text:A westbound section of freeway currently has three
12-ft wide lanes, a 6-ft right shoulder, and no ramps
within 3 miles upstream and downstream of the
segment midpoint. It is on rolling terrain with 10%
heavy vehicles and is operating at capacity with a
peak-hour factor of 0.9.
If the road is expanded to five 11-foot lanes with a 2-
foot right shoulder, and traffic after the expansion is
projected to increase by 5% with the same heavy
vehicle percentage and peak-hour factor.
What is the LOS and estimated density BEFORE and
AFTER expansion?
Before expansion:
Density = 44.46
LOS = E
After expansion:
New Density = 26.67
New LOS = D
%3D
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