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Subproblem 3b - Page 4 of 6 |
ID# C303B04 |
Sub-problem 3b: Operational
Analysis of the Center Section of Krome Avenue (Class I or II Two-Lane
Highway Facility)
Step
2. Results
Exhibit 3-20
compares the results from the planning level analysis in
sub-problem 2b with
the operational level analysis. It shows the values assumed by the
service volume tables for all parameters, as compared with the values that
apply to this facility. It also shows the computations and results for both
methods. The ATS was computed as 39.3 mph. The PTSF was computed as 70.1%.
If this facility were
designated as a Class I highway, the ATS would be the critical determinant
of LOS, producing a value of E. The PTSF would have suggested LOS D. If
the designation were changed to Class II, the ATS would be eliminated as a
determinant of LOS, and the PTSF would establish LOS D.
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Exhibit 3-20. Center Section: Comparison of Planning and Operational
Level Analysis Results |
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Input Data |
Table
Assumptions
HCM Chapter 10
Sub-problem 2b |
Field
Observations
HCM Chapter 20
Sub-problem 3b |
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Terrain |
Level |
Level |
|
Base Free Flow Speed |
N/A |
53.1 mph |
|
Access Points Per Mile |
N/A |
2 |
|
Shoulder Width |
N/A |
3 |
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Free Flow Speed |
50 mph |
50 |
|
Directional Split |
60/40 |
57/43 |
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Percent Trucks |
14 |
26 |
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Percent RV's |
4 |
Included in
Percent Trucks |
|
Percent No Passing |
20 |
8 |
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PHF |
N/A |
0.91 |
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Design Hour Volume |
1,190 |
1,190 |
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Comparison
of Results |
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Table
Thresholds |
Computations |
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LOS A: |
--- |
ATS=39.3
PTSF=70.1
v/c=0.42 |
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LOS B: |
--- |
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LOS C: |
330 |
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LOS D: |
1,000 |
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LOS E: |
2,770 |
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Estimated LOS |
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Class I Facility |
E |
E |
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Class II Facility |
N/A |
D |
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3c
