ramps within 3 miles upstream and downstream ofthe segment midpoint. It is on rolling terrain with10% heavy vehicles and is operating at capacity witha peak-hour factor of 0.9. If the road is expanded tofour 11-foot lanes with a 2-foot right shoulder, andtraffic after the expansion is projected to increase by10% with the same heavy vehicle percentage andpeak-hour factor, what is the new LOS andestimated density?P-22 Chapter 6Problemshour. What would be the LOS before and after theheavy vehicles are allowed on the upgrade(assuming 50% SUTs and 50% TTs.)?6.21 A multilane highway has four lanes (two lanesin each direction) and a measured FFS of 55 mi/h.The directional peak-hour volume is 1900 vehicles(the peak-hour factor is 0.80). One upgrade is 5%and is 0.62 mi long. Currently, heavy vehicles arenot permitted on the highway, but local authoritiesare considering allowing heavy vehicles on thisupgrade. If this is done, they estimate that 150heavy vehicles will use the highway during the peakconsists of cars and some percentage of heavyvehicles. The peak-hour factor is 0.85. If heavyvehicles were banned from the highway and car

N=4 lanesFFS= 55 mi/hPHF=0.8PHV= 1900 vehupfrade=55%SUT (50%) and TT (50%) No. of trucks…

6.21 A multilane highway has four lanes (two lanes in each direction) and a measured FFS of 55 mi/h. The directional peak-hour volume is 1900 vehicles (the peak-hour factor is 0.80). One upgrade is 5% and is 0.62 mi long. Currently, heavy vehicles are not permitted on the highway, but local authorities are considering allowing heavy vehicles on this upgrade. If this is done, they estimate that 150 heavy vehicles will use the highway during the peak

6.21 A multilane highway has four lanes (two lanes in each direction) and a measured FFS of 55 mi/h. The directional peak-hour volume is 1900 vehicles (the peak-hour factor is 0.80). One upgrade is 5% and is 0.62 mi long. Currently, heavy vehicles are not permitted on the highway, but local authorities are considering allowing heavy vehicles on this upgrade. If this is done, they estimate that 150 heavy vehicles will use the highway during the peak

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Capacity and Level of Service at Intersections

The term capacity is associated with transportation engineering. Capacity helps to understand how many pedestrians or vehicles can be handled by a transport facility. Level of service is also a term associated with transportation engineering. The level of service indicates the performance of the transport facility.

Question

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
four 11-foot lanes with a 2-foot right shoulder, and
traffic after the expansion is projected to increase by
10% with the same heavy vehicle percentage and
peak-hour factor, what is the new LOS and
estimated density?
P-22 Chapter 6
Problems
hour. What would be the LOS before and after the
heavy vehicles are allowed on the upgrade
(assuming 50% SUTs and 50% TTs.)?
6.21 A multilane highway has four lanes (two lanes
in each direction) and a measured FFS of 55 mi/h.
The directional peak-hour volume is 1900 vehicles
(the peak-hour factor is 0.80). One upgrade is 5%
and is 0.62 mi long. Currently, heavy vehicles are
not permitted on the highway, but local authorities
are considering allowing heavy vehicles on this
upgrade. If this is done, they estimate that 150
heavy vehicles will use the highway during the peak
consists of cars and some percentage of heavy
vehicles. The peak-hour factor is 0.85. If heavy
vehicles were banned from the highway and car

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A long segment of suburban freeway is to be designed on level terrain. The level segment, however, is followed by a 4.5% grade, 2.0 miles in length. If the DDHV is 2,500 vehicles per hour with 15% trucks (standard mix), how many lanes will be needed on the (A.) Upgrade, (B.) Downgrade, (C.) Level terrain segment to provide for level of service C? Lane widths and lateral clearances may be assumed to be 12 feet and 6 feet, respectively. Ramp density is expected to be 1.0 ramps per mile. The PHF is 0.92. Good weather, no incidents, no work zones, and regular users of the facility may be assumed.
A 5% upgrade on a six-lane freeway (three lanes in each direction) is 1.25 mi long. On this segment of freeway, there is 3% SUTS and 7% TTs, and the peak-hour factor is 0.90. The lanes are 12 ft wide, there are no lateral obstructions within 6 ft of the roadway, and the total ramp density is 1.0 ramps per mile. What is the maximum directional peak-hour volume that can be accommodated without exceeding LOS C operating conditions in veh/h? Round of your answer to whole number. Blank 1
If Vf = 2327 VPH with 9% trucks, VR1 = 653 VPH with 5% trucks, and VR2 = 594 VPH with 8% trucks, what is the passenger car equivalents (Vpcph) of the onramp? Assume that the roadway is urban.
A segment of rural freeway is being designed for a FFS of 70 mph through rolling terrain. The directional (i.e. one-way) design volume is 3,000 vehicles per hour. If 10% of the design volume is expected to be heavy vehicles (i.e. trucks and buses), what is the heavy vehicle adjustment used to determine the flow rate? Provide you answer to the nearest hundredths.