Traffic Solution

Example 1:
At a highway intersection, transaction difference of opinions are to be controlled by a job contract system. The design hour traffic volumes are given in Table 1.
a) Propose an appropriate design of a fixed-time traffic signal system without considering the presence of pedestrians at the junction. The average passenger car equivalent is 1 vehicle = 1.1 pcu. All approaches check two 3.5 m wide lanes and the gradient is +5% from northward to south. An all red period may be taken as 2 sec/ chassis, starting delays equal to 2 sec/ cast and an amber period of 3 sec.
b) gift the traffic phase sequence and timing draws for the proposed design.





Table 1: Traffic Demand in veh/h
from| N| S| E| W|
to| E| S| W| W| N| E| S| W| N| N| E| S|
lessen | 50| 250| 70| 80| 250| 60| blow| 560| 170| 100| 600| 180|

traffic conflate (pcu/h):

2-phase system
phase 1:W + ETH + LT + RT
phase 2:N + STH + LT + RT

phase diagram:

check for separate RT phase needs:
phase 1:W E, E N
dispute flow=600 x 170
=102000 veh/h(>50000 pcu/h)
keepnot combine in 1 phase

E W, W S
conflict flow=560 x 180
=100800 veh/h(>50000 pcu/h)
cannot combine in 1 phase

phase 2:N S, S E
conflict flow=250 x 60
=15000 veh/h(<50000 pcu/h)
RTN=60 veh/h(<100 pcu/h)
can combine in 1 phase

S N, N W
conflict flow=250 x 70
=17500 veh/h(<50000 pcu/h)
RTS=70 veh/h(<100 pcu/h)
can combine in 1 phase

Alternative A:
3-phase system
phase 1:W + ETH + LT
phase 2:W + ERT
phase 3:N + STH + LT + RT

phase diagram:

phase| 1| 2| 3|
from| W| E| W| E| N| S|
to| E| N| W| S| S| N| S| E| W| N| W| E|
qpcu| 660| 110| 616| 110| 198| 250| 275| 55| 74| 275| 88| 66|
qtotal| 770| 726| 198| 250| 407| 429|
S| 1885| 1885...If you want to get a full essay, order it on our website: Ordercustompaper.com



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