Sub-problem 3c: Operational Analysis of the South Section of Krome Avenue (Class I Signalized Arterial)

In sub-problem 2c, we have produced an estimate of the LOS for the south section of Krome Avenue, using the service volume tables in HCM Exhibit 10-7. These tables assume that the facility operates with the characteristics of typical signalized arterials of the same class. In this sub-problem, we will examine the assumptions and substitute observed values from the field to apply the more detailed operational procedures.

What additional data will be applied in the operations procedure? The procedures given in HCM Chapter 15 will be applied to this section. The additional data (i.e., beyond the sub-problem 2c requirements) include:

• percent trucks

• directional distribution

• percent turns from exclusive lanes

• cycle length

• effective green ratio

• degree of saturation

• lane group capacity

• arrival type

The application of the HCM Chapter 15 procedure is considerably more complicated than the service volume tables in HCM Chapter 10. Each signalized intersection must be analyzed in detail using the signalized intersection analysis procedures prescribed by HCM Chapter 16. Knowledge of the signal timing plan, as well as the operating parameters for each approach, is required.

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