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MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
5th Edition
ISBN: 9781305581159
Author: Nicholas J. Garber; Lester A. Hoel
Publisher: Cengage Learning US
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Chapter 9, Problem 5P
To determine
The level of service.
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An urban freeway is to be designed using the following information.
AADT = 51,900 veh/day
K (proportion of AADT occurring during the peak hour): 0.12
D (proportion of peak hour traffic traveling in the peak direction): 0.65
Trucks: 8% of peak hour volume
PHF = 0.96
Lane width: 12 ft
Shoulder width: 10 ft
Total ramp density: 0.5 interchange/mile; all interchanges are to be cloverleaf interchanges
Terrain: rolling
Determine the number of lanes in the peak direction required to provide LOS…
An urban freeway is to be designed using the following information.
AADT = 52,500 veh/day K (proportion of AADT occurring during the peak hour): 0.12
D (proportion of peak hour traffic traveling in the peak direction): 0.65
Trucks: 8% of peak hour volume
PHF = 0.94
Lane width: 12 ft
Shoulder width: 10 ft
Total ramp density: 0.5 interchange/mile; all interchanges are to be cloverleaf interchanges
Terrain: rolling
Determine the number of lanes in the peak direction required to provide LOS C. (Assume commuter traffic and assume no RVs.)_______ lanes
Show all calculations required. (Calculate your answers for the peak direction only. Enter fHV, the peak hour volume in veh/h, the free flow speed in mi/h, the demand flow rate in pc/h/ln, the mean speed in mi/h, and the density in pc/mi/ln.)
fHV ________
peak hour volume___________veh/h
free flow speed_______ mi/h
demand flow rate___________ pc/h/ln
mean speed_________ mi/h
density_____________ pc/mi/ln.
An urban freeway is to be designed using the following information.
AADT = 51,500 veh/day
K (proportion of AADT occurring during the peak hour): 0.11
D (proportion of peak hour traffic traveling in the peak direction):0.65
Trucks: 8% of peak hour volume
PHF = 0.94
Lane width:12 ft
Shoulder width:10 ft
Total ramp density:0.5 interchange/mile; all interchanges are to be cloverleaf interchanges
Terrain:rolling
Determine the number of lanes in the peak direction required to provide LOS C. (Assume commuter traffic and assume no RVs.)_______
calculations required Calculate your answers for the peak direction only.
Enter fHV,
the peak hour volume _____veh/h
the free flow speed _______ mi/h
the demand flow rate i_______ pc/h/ln
the mean speed ________mi/h
the density ______ pc/mi/ln.)
Chapter 9 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
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- An existing urban freeway with 4 lanes in each direction has the following characteristics. Traffic data: Peak hour volume (in the peak direction): Trucks: PHF = 0.93 Geometric data: LOS A OLOS B LOS C LOS D LOS E LOS F Lane width: Shoulder width: Total ramp density: Terrain: rolling 11 ft 6 ft 1.8 ramps per mile Determine the LOS in the peak hour. (Assume commuter traffic and assume no RVs.) 7,090 veh/h 10% of peak hour volume Show the demand flow rate (in pc/h/In), mean speed (in mi/h), and density (in pc/mi/In) for the given conditions. demand flow rate 2191 pc/h/In mean speed density 50 X mi/h 43.82 X pc/mi/Inarrow_forwardAn existing urban freeway with 4 lanes in each direction has the following characteristics. Traffic data: Peak hour volume (in the peak direction): Trucks: PHF = 0.93 Geometric data: LOS A LOS B LOS C LOS D LOS E LOS F Lane width: Shoulder width: Total ramp density: Terrain: rolling 11 ft 6 ft 1.8 ramps per mile Determine the LOS in the peak hour. (Assume commuter traffic and assume no RVs.) mean speed density 7,010 veh/h 10% of peak hour volume Show the demand flow rate (in pc/h/In), mean speed (in mi/h), and density (in pc/mi/In) for the given conditions. demand flow rate 2199 pc/h/In 54 X mi/h 41 X pc/mi/Inarrow_forwardAn existing urban freeway with 4 lanes in each direction has the following characteristics. Traffic data: Peak hour volume (in the peak direction): 7,110 veh/h Trucks: 10% of peak hour volume PHF = 0.93 Geometric data: Lane width: 11 ft Shoulder width: 6 ft Total ramp density: 1.8 ramps per mile Terrain: rolling Determine the LOS in the peak hour. (Assume commuter traffic and assume no RVs.) LOS A LOS B LOS C LOS D LOS E LOS F Show the demand flow rate (in pc/h/ln), mean speed (in mi/h), and density (in pc/mi/ln) for the given conditions. demand flow rate pc/h/lnmean speed mi/h density pc/mi/lnarrow_forward
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