TRAFFIC SIGNAL DESIGN Saturation flow Movement Approach Direction Volume, pcu/hr rate, pcu/hr 1234 North South East Through+Right Through+Right Through+Right 930 1800 700 1800 650 2000 West Through+Right 420 2000 Appropriate two-phase signal SHOW A FULL SOLUTION 1. Compute for the optimum cycle length Phase 1 3 16 Phase 2 5. Estimate the average delay per vehicle per cycle of movement 3 using this formula: a) 100 b) 110 c) 120 d) 130 2. Compute for the effective green time for Phase 1 a) 30 a) 27 b) 32 b) 31 c) 34 d = -2 (1-2) Where r=effective red = Cycle length-effective green c) 35 d) 39 3. Compute for the effective green time for Phase 2 a) 63 b) 66 c) 69 d) 72 4. Compute for the capacity of the South approach a) 1031pcu/hr b) 1062pcu/hr c) 1093pcu/hr d) 1124pcu/hr d) 36 DRAWING 6. Draw the timing diagram (Make sure its clear and with complete information) 7. Draw the conflict areas in a four-legged intersection, using the following information: Leg 1: All movements permitted (RT, LT and Thru) Leg 2: All movements permitted (RT, LT and Thru) Leg 3: Only Left-turn movement not permitted Leg 4: Thru-traffic is only permitted 8. Number of merging conflict points 9. Number of diverging conflict points 10. Number of crossing conflict points
TRAFFIC SIGNAL DESIGN Saturation flow Movement Approach Direction Volume, pcu/hr rate, pcu/hr 1234 North South East Through+Right Through+Right Through+Right 930 1800 700 1800 650 2000 West Through+Right 420 2000 Appropriate two-phase signal SHOW A FULL SOLUTION 1. Compute for the optimum cycle length Phase 1 3 16 Phase 2 5. Estimate the average delay per vehicle per cycle of movement 3 using this formula: a) 100 b) 110 c) 120 d) 130 2. Compute for the effective green time for Phase 1 a) 30 a) 27 b) 32 b) 31 c) 34 d = -2 (1-2) Where r=effective red = Cycle length-effective green c) 35 d) 39 3. Compute for the effective green time for Phase 2 a) 63 b) 66 c) 69 d) 72 4. Compute for the capacity of the South approach a) 1031pcu/hr b) 1062pcu/hr c) 1093pcu/hr d) 1124pcu/hr d) 36 DRAWING 6. Draw the timing diagram (Make sure its clear and with complete information) 7. Draw the conflict areas in a four-legged intersection, using the following information: Leg 1: All movements permitted (RT, LT and Thru) Leg 2: All movements permitted (RT, LT and Thru) Leg 3: Only Left-turn movement not permitted Leg 4: Thru-traffic is only permitted 8. Number of merging conflict points 9. Number of diverging conflict points 10. Number of crossing conflict points
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
SHOW FULL SOLUTION
Transcribed Image Text:TRAFFIC SIGNAL DESIGN
Saturation flow
Movement
Approach
Direction
Volume, pcu/hr
rate, pcu/hr
1234
North
South
East
Through+Right
Through+Right
Through+Right
930
1800
700
1800
650
2000
West
Through+Right
420
2000
Appropriate two-phase signal
SHOW A
FULL
SOLUTION
1. Compute for the optimum cycle length
Phase 1
3
16
Phase 2
5. Estimate the average delay per vehicle per cycle of
movement 3 using this formula:
a) 100
b) 110
c) 120
d) 130
2. Compute for the effective green time for Phase 1
a) 30
a) 27
b) 32
b) 31
c) 34
d =
-2 (1-2)
Where r=effective red = Cycle length-effective green
c) 35
d) 39
3. Compute for the effective green time for Phase 2
a) 63
b) 66
c) 69
d) 72
4. Compute for the capacity of the South approach
a) 1031pcu/hr
b) 1062pcu/hr
c) 1093pcu/hr
d) 1124pcu/hr
d) 36
DRAWING
6. Draw the timing diagram (Make sure its clear and
with complete information)
7. Draw the conflict areas in a four-legged intersection,
using the following information:
Leg 1: All movements permitted (RT, LT and Thru)
Leg 2: All movements permitted (RT, LT and Thru)
Leg 3: Only Left-turn movement not permitted
Leg 4: Thru-traffic is only permitted
8. Number of merging conflict points
9. Number of diverging conflict points
10. Number of crossing conflict points
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