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Sub-problem 4c: Peak Operational Analysis of
Alternate Route 7
Let's note one
other result for the sections downstream from the bottleneck (section 6).
Note that the volume/capacity ratio is less than the demand/capacity ratio.
Or, similarly, the demand is higher than the volume. What is the implication
of this result? Some vehicles that desire to reach sections
downstream from the bottleneck (sections 7 through 11) are unable to do so
during time period 2. They are in the queue forming in sections 4
and 5 and will be delayed in this queue until at least time period 3. This unserved demand is transferred from time period 2 to time period 3.
Section (Time Period 2) |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
Length (ft) |
3,675 |
670 |
1,025 |
775 |
1,890 |
10,900 |
1,500 |
3,100 |
1,115 |
1,500 |
2,000 |
Number of lanes |
2 |
4 |
2 |
4 |
3 |
2 |
2 |
2 |
2 |
4 |
4 |
Type (B,W, ONR, OFR) |
B |
W |
B |
ONR |
B |
B |
OFR |
B |
ONR |
ONR |
B |
Free flow speed (mph) |
55 |
55 |
55 |
55 |
55 |
55 |
55 |
55 |
55 |
55 |
55 |
Speed (mph) |
55.0 |
33.3 |
49.5 |
25.8 |
19.2 |
49.8 |
49.4 |
54.9 |
48.9 |
54.3 |
55.0 |
Density (veh/mi/ln) |
19.5 |
25.7 |
21.2 |
44.9 |
75.8 |
44.0 |
39.4 |
28.4 |
31.3 |
26.1 |
26.2 |
Segment Capacity (vph) |
4,375 |
5,020 |
4,375 |
8,750 |
6,565 |
4,375 |
4,375 |
4,375 |
4,375 |
8,750 |
8,750 |
Level of Service |
C |
C |
C |
F |
F |
F |
E |
D |
D |
C |
D |
Segment Demand (vph) |
2,150 |
3,425 |
2,100 |
4,850 |
4,850 |
4,850 |
4,850 |
3,460 |
3,880 |
6,090 |
6,090 |
Segment Volume (vph) |
2,150 |
3,425 |
2,100 |
4,640 |
4,375 |
4,375 |
4,375 |
3,120 |
3,540 |
5,750 |
5,750 |
d/c ratio |
0.49 |
0.68 |
0.48 |
0.55 |
0.74 |
1.11 |
1.11 |
0.79 |
0.89 |
0.70 |
0.70 |
v/c ratio |
0.49 |
0.68 |
0.48 |
0.53 |
0.67 |
1.00 |
1.00 |
0.71 |
0.81 |
0.66 |
0.66 |
Minute Queue Begins in Segment |
|
|
|
9 |
1 |
|
|
|
|
|
|
Minute Queue Ends in Segment |
|
|
|
** |
** |
|
|
|
|
|
|
Queue Length at End of Time Period (ft) |
|
|
|
745 |
1,890 |
|
|
|
|
|
|
When you are ready to review the results from time periods
3 and 4, proceed to the next page.
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[Continue] with Sub-problem 4c |