Given:
XC = critical v/c ratio for the intersection = 0.85
S = Saturation flow rate =1900 veh/ hr
PHF = Peak Hour Flow = 0.95
L = total lost time per cycle = 14 sec
where,
C = cycle length (sec)
(v/c) = critical ratio = ratios of actual flow to saturation flow
Σ (v/c) = summation of the flow ratio
4.A two-phase signal system is to be designed for an isolated intersection with a peak hour tacto...
Can someone show me where I went wrong. Thanks!
13. Using the intersection information below, recommend a cycle length for a two-p hase traffic cle and peak hour signal using the Highway Capacity Manual method. Use a loss time 7sper cy factor of 0.97 (20%) Peak hour volumes shown 484 Г 162 190 515 PHASE LANE GROUP SATURATION FLOw 1600 2 2800 31600 2800 2200 2200 าไ se equivalent volumus 10.64 4 Wor toogo S03
13. Using the intersection information...
An intersection has a four-phase signal with the movements allowed in each phase and the corresponding analysis and saturation flow rates shown in the table below. Please complete the following: a. Calculate the sum of flow ratios for the critical lane groups. b. Calculate the minimum cycle length and effective green time for each phase (balancing v/c ratio for each lane group). Assume the lost time is 4 sec/phase and a critical intersection vc ratio of 0.95 is desired. c. Calculate the optimal...
A four-phase traffic signal is to be designed for a major intersection. The critical volume to saturation flow rates (v/s for each phase are given below a) If lost time per phase is 2 seconds, determine the cycle length such that the critical v/c ratio for the intersection is 0.92. The cycle length needs to be rounded up to the nearest multiple of 5 b) For this cycle length, find the effective green times for each phase (Use the HCM method described...
the intersection has a four-timing-state signal with the
movements allowed in each timing stage and corresponding analysis
and saturation flow rates shown in the table.
a) calculate the minimum cycle length and effective green time
for each timing stage (balancing v/c for the critical lane groups).
assume the lsot time is 4 seconds per timing stage and a criticsl
intersection v/c of 0.9 is desired.
b) calculate the intersection control delay and level of
service, assumjng pre-times isolated intersection.
4...
3- Consider the third example solved in the lecture videos. Two additional 12-ft through lanes are added to Vine Street (the street in the intersection of the first example solved in the lecture videos), one lane in each direction. If the peak-hour traffic volumes are unchanged but the Vine Street left-turn saturation flow rates increase by 120 veh/h because of the added through lanes, what would the revised effective green time, yellow time, and all-red time be for each phase?...
4- Consider Problem 3. Calculate the new minimum pedestrian green time, assuming the effective crosswalk width is 6 ft and the maximum number of crossing pedestrians in any phase is 20. This is the problem 3 Two additional 12-ft through lanes are added to Vine Street, one lane in each direction. If the peak-hour traffic volumes are unchanged but the Vine Street left-turn saturation flow rates increase by 120 veh/h because of the added through lanes, what would the revised...
What is the difference between actual green time and effective green time A They are the same, just different naming terminologies B Actual green time include lost times while effective green time esclude lost times C. Actual green time include pedestrian time while effective green does not D. One is calculated using Highway Capacity while the other in Wester Method Ideal (base) sauration flow rate is taken as So - 1.900 pphalThis value (1900) onte as dividing 3600 by Aspeed...