An existing Class I two-lane highway is to be analyzed to determine the two-way level of service, given the following information: Traffic data: PHV _ 600 veh/h 60% in the peak direction 8% trucks 2% recreational vehicles PHF = 0.86 No-passing zones: 40% Geometric data: Rolling terrain BFFS _ 55 mi/h Lane width _ 11 ft Shoulder width _ 2 ft 8 access points per mile

An existing Class I two-lane highway is to be analyzed to determine the two-way level of service, given the following information: Traffic data: PHV _ 600 veh/h 60% in the peak direction 8% trucks 2% recreational vehicles PHF = 0.86 No-passing zones: 40% Geometric data: Rolling terrain BFFS _ 55 mi/h Lane width _ 11 ft Shoulder width _ 2 ft 8 access points per mile

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter9: Capacity And Level Of Service For Highway Segments

Section: Chapter Questions

Problem 21P

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17 An existing urban freeway with 4 lanes in each direction has the following characteristics: Traffic data: Peak hour volume (in the peak direction): 7070 veh/h Trucks: 10% of peak hour volume PHF _ 0.94 Geometric data: Lane width: 11 ft Shoulder width: 6 ft Interchange spacing (average): 1.4 mile Terrain: rolling Determine the LOS in the peak hour. Clearly state assumptions used for any values not given. Show the demand flow rate, mean speed, and density for the given conditions.
An existing Class I two-lane highway is to be analyzed to determine the level of servicein each direction, given the following information:Traffic data:PHV = 600 veh/h60% in the peak direction8% trucks2% recreational vehiclesPHF = 0.86No passing zones: 40%Geometric data:Rolling terrainBFFS = 55 mi/h (88 km/h)Lane width = 11 ft (3.3 m)Shoulder width = 2 ft (0.6 m)8 access points per mile (5 access points per km)
From the following cross section notes where SSis 1.5H:1V and width of highway is 20.00 meters at every station. Determine the following: 1. Total road volume using end area 2. Total road volume using prismoidal formula 3. Total road volume using prismoidal correction Cross -Section Notes STA 5+100 - 6.2 -6.0 -12.0 -5.3 0.0 -4.0 10.0 -8.8 -X - 4.2 -2.0 8.0 STA 5+160 -5.0 -8.0 -6.5 0.0 -7.6 -X Draw the cross-section of profile of roadway per station.
The following figure shows the Level of Service (LOS) criteria for a multilane highway segment. If the free flow speed is 45 mph and the analysis flow rate is 1800 passenger cars per hour per lane (pc/h/In). What is the actual speed and density of the traffic flow at this specific location? What is the LOs of the location? 70 free-flow Seed 60 mih 56 mi 50 mih 45 mih LOS A 60 50 40 30 20 pomit 45 400 800 1200 1600 2000 2400 Flow Rate (pc/h/in) (uju) paads eg-buasseg abeany
QUESTION 1 The approaches of a 4-leg signalized intersection are configured with 1 NB lane, 1 SB lane, 1 EB lane, and 1 WB lane and each of these lanes serves LT, TH, and RT movements. The following volumes and phasing are provided. approach EB WB NB SB movement LT TH RT LT TH RT LT TH RT LT TH RT volume 120 480 160 80 560 100 20 200 40 12 160 48 2 6 What is the critical sum for the EB/WB barrier?
An undivided multilane highway segment has the following characteristics: • Six lanes (three lanes in each direction); Lane width of 11 ft; • Speed limit of 45 mph; Right shoulders is 4 ft wide; • There are approximately 25 access points over a 2-mile section of this roadway, in each direction. Calculate the FFS at this highway section and then determine the level of service (LOS) when the flow rate is 1100 pc/h/In. (Write the answer for the LOS in the box below).
The following 10 vehicle speeds (in mi/h) were in measured on a roadway segment: 60, 65, 64, 71, 66, 65, 59, 63, 72, 71. The space mean speed for this data set is: O 65.0 C 65.3 65.6 Insufficient information is provided. O None of the above
From the following cross section notes where SS is 1.5H:1V and width of highway is 20.00 meters at every station. Determine the following: 1. Total road volume using end area 2. Total road volume using prismoidal formula 3. Total road volume using prismoidal correction Cross -Section Notes - 6.2 -5.3 0.0 STA 5+100 -6.0 -12.0 -4.0 10.0 -8.8 -X STA 5+160 - 4.2 -5.0 -8.0 -6.5 0.0 -2.0 8.0 -7.6 -X Draw the cross-section of profile of roadway per station.
Question 4 One stretch of two-lane two-way roadway that traverses through level terrain is expected to carry 1400 vehicle per hour. Determine the Level of Service (LOS) in the peak direction for the road based on average travel speed (ATS) if the characteristics of the roadway are as follows: Table Q4-1 Percentage of Trucks Percentage of Recreational Vehicle Peak Hour Factor 10 0.97 60:40 60 Percent Directional Split Percent no-passing Zone Lane Widths Shoulder Widths Design Speed Road Length Access Points 3.35 m 1.2 m 96 km/h 8 km 10 access points per km State all assumption (if any) used in calculation..
Traffic volume is 2578 veh/hr with 687 vehicles arriving in peak 15 minutes.There are tow lanes, 12 percent trucks(30/70 split for SUT/TT), the length of the road is 1.8 miles long with a 3.5 percent grade. calculate the analysis flow rate?
A section of rural 2 lane highway is to be designed to carry a peak hour volume of 1500 on a level terrain. Determine the level of service at which it will operate using the following data: V Lane width = 11 ft V No passing zone = 20% Directional split = 60/40 V Decimal fraction of trucks = 0.10 V Decimal fraction of recreational vehicles = 0.04 V Decimal fraction of buses = 0.01 Shoulder width =6 ft PHF = 0.95
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…