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Subproblem 3c - Page 4 of 5 |
ID# C303C04 |
Sub-problem 3c: Operational
Analysis of the South Section of Krome Avenue (Class I Signalized Arterial
Facility)
Step 2. Results.
Exhibit 3-22 compares the results from the planning level
analysis in
sub-problem 2c
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 overall average speed was 37.3 mph,
which suggests LOS B. This result is consistent with the planning
level analysis from
sub-problem 2c.
Exhibit 3-22. South Section: Comparison of
Planning and Operational Level Analysis Results |
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Table Assumptions
HCM Chapter 10
Sub-problem 2c |
Field Observations
HCM Chapter 15
Sub-problem 3b |
Notes |
Classification |
I |
I |
Signal Density≈1 signal/mile |
Free Flow Speed |
50 mph |
50 mph |
Posted speed +5 mph |
Signal Density |
0.8 per mile |
1.0 per mile |
Scaled from map |
Cycle Length |
110 seconds |
88 seconds |
varies from 76 to 106 sec |
Effective g/c |
0.45 |
0.53 |
varies from 0.48 to 0.57 |
Adj. Sat. Flow Rate |
1,850 vphgpl |
1,744 vphgpl |
varies from 1,675 to 1,810 |
Arrival Type |
3 |
3 |
No coordination |
Unit Extension |
3 |
3 |
Average value |
Initial Queue |
0 |
0 |
None observed |
Other Delay |
0 |
0 |
None observed |
PHF |
0.92 |
0.92 |
None observed |
Turns from Exclusive Lanes |
10% |
11% |
Varies from 5% to 22% |
Left Turn Bays |
Yes |
Yes |
Except for Avocado |
Lane Utilization Factor |
1 |
1 |
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Design Hour Volume |
812 |
812 |
Average value |
Chapter 10 Results |
LOS Thresholds |
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LOS A |
--- |
>42 mph |
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LOS B |
<860 vph |
>34-42 mph |
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LOS C |
>860-930 vph |
>27-34 mph |
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LOS D |
>930-1,020 vph |
>21-27 mph |
Travel Time=681 sec |
LOS E |
>1,020-1,140 vph |
>16-21 mph |
Section Length=7.08 miles |
LOS F |
>1,140 vph |
<16 mph |
Average Speed=37.4 mph |
LOS = B |
LOS = B |
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