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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

 

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
Design Hour Volume 812 812 Average value
Chapter 10 Results
LOS Thresholds
LOS A

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 >42 mph
LOS B <860 vph >34-42 mph
LOS C >860-930 vph >27-34 mph
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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