An eight-lane freeway has a capacity of 8000 vehicles hour in each direction under normal conditions. On a particular day, an accident occurs at 8:00 am. Initially, two lanes are blocked, which reduces the capacity of the freeway past this point to 2,000 vehicles per hour. At 8:45, the accident is removed from the traffic lanes, which increases capacity past this point to 4000 vehicles per hour, and at 9:00 it is removed completely, which restores capacity to 8000 vehicles per hour. Demand past the point of the accident is shown below. Finish the following table and draw the queuing diagram.
An eight-lane freeway has a capacity of 8000 vehicles hour in each direction under normal conditions. On a particular day, an accident occurs at 8:00 am. Initially, two lanes are blocked, which reduces the capacity of the freeway past this point to 2,000 vehicles per hour. At 8:45, the accident is removed from the traffic lanes, which increases capacity past this point to 4000 vehicles per hour, and at 9:00 it is removed completely, which restores capacity to 8000 vehicles per hour. Demand past the point of the accident is shown below. Finish the following table and draw the queuing diagram.
|
Time period 8:00-8:15 8:15-8:30 8:30-8:45 8:45-9:00 9:00-9:15 9:15-9:30 |
15 minute volume 800 1000 1200 800 700 1000 |
Cumulative volume 800 1800 3000 3800 4500 5500 |
Finish this Table,
|
Time period |
Time |
Arrival |
Departure |
# of vehicle in queue |
|
8:00:00 |
0 |
0 |
0 |
0 |
|
8:05:00 |
5 |
267 |
167 |
100 |
|
8:10:00 |
10 |
|
|
|
|
8:15:00 |
15 |
|
|
|
|
8:20:00 |
20 |
|
|
|
|
8:25:00 |
25 |
|
|
|
|
8:30:00 |
30 |
|
|
|
|
8:35:00 |
35 |
|
|
|
|
8:40:00 |
40 |
|
|
|
|
8:45:00 |
45 |
|
|
|
|
8:50:00 |
50 |
|
|
|
|
8:55:00 |
55 |
|
|
|
|
9:00:00 |
60 |
|
|
|
|
9:05:00 |
65 |
|
|
|
|
9:10:00 |
70 |
|
|
|
|
9:15:00 |
75 |
|
|
|
|
9:20:00 |
80 |
|
|
|
|
9:25:00 |
85 |
|
|
|
|
9:30:00 |
90 |
|
|
|
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