Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 8, Problem 16P
To determine
Using Webster methods for intersection determine suitable signal phasing system and phase length.
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Consider the tabulated intersection design data
below, then the number of vehicles stopped during
the red interval for Phase EW is about
..............
vehicles. Assume that Qs is 2000 vphpl and use
Webster's method procedure.
All-red ts (sec)
(sec)
Qa (vph)
Yellow
Lane 1
Lane 2
(sec)
Phase N
500
600
2
3
Phase S
650
550
2
2
2
Phase EW
300
250
2
1
2
а.
13
b.
C.
10
d.
6.
Clear my choice
For the geometric and traffic characteristics shown below, determine a suitable signal
phasing system and phase lengths for the intersection using the Webster method.
Show a detailed layout of the phasing system and the intersection geometry used.
North
South
East
West
Арproach
56 ft
Approach
56 ft
Арproach
68 ft
Аpproach
68 ft
Approach Width
Peak-hour approach volume
Left turn
Through movement
Right turn
PHF
Confilicting pedestrian volume 900 ped/hr
73
373
133
168
134
420
563
516
140
135
169
178
0.95
0.95
0.95
0.95
1200 ped/hr 1200 ped/hr 900 ped/hr
Assume the following saturation flows:
Through lanes 1600 veh/In/h
Through and right lanes 1400 veh/In/h
Left lanes 1000 veh/In/h
Left and through lanes 1200 veh/In/h
Left, through, and right lanes 1100 veh/In/h
The geometric and traffic characteristics are shown below, determine a suitable signal
phasing system and phase lengths for the intersection using the Webster method. Show a
detailed layout of the phasing system and the intersection geometry used.
South
Approach
S6 fi
North
East
West
Approach
56 fi
Approach
Approach
68 f
Арproach Widih
Peak-hour approach volume
Left turn
Through movement
Right turn
PHF
Confilicting pedestrian volume 900 ped/hr 1200 ped/hr 1200 ped/hr 900 ped/hr
133
420
73
168
134
373
135
563
516
178
140
169
0.95
0.95
0.95
0.95
Assume the following saturation flows:
Through lanes: 1760 vehIn/h
Through and right lanes: 1540 veh/In/h
Left lanes: 1100 veh/n/h
Left and through lanes: 1320 veh/in/h
Left, through, and right lanes: 1210 veh/n/h
Chapter 8 Solutions
Traffic and Highway Engineering
Ch. 8 - Prob. 1PCh. 8 - Prob. 2PCh. 8 - Prob. 3PCh. 8 - Prob. 4PCh. 8 - Prob. 5PCh. 8 - Prob. 6PCh. 8 - Prob. 7PCh. 8 - Prob. 8PCh. 8 - Prob. 9PCh. 8 - Prob. 10P
Ch. 8 - Prob. 11PCh. 8 - Prob. 12PCh. 8 - Prob. 13PCh. 8 - Prob. 14PCh. 8 - Prob. 15PCh. 8 - Prob. 16PCh. 8 - Prob. 17PCh. 8 - Prob. 18PCh. 8 - Prob. 19PCh. 8 - Prob. 20PCh. 8 - Prob. 21PCh. 8 - Prob. 22PCh. 8 - Prob. 23PCh. 8 - Prob. 24PCh. 8 - Prob. 25PCh. 8 - Prob. 26PCh. 8 - Prob. 27PCh. 8 - Prob. 28P
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