Subproblem 2a - Page 2 of 3
Sub-problem 2a: Analysis of the North Section of Krome Avenue (Class I
Two-Lane Highway Facility)
Step 1. Setup
Now let's review each of these questions
and how they are important to this analysis.
What information is gained by performing a planning
The example service volume table (HCM Exhibit 12-15) will
be applied to this roadway facility to estimate the LOS for planning
purposes. Because of the assumptions and approximations that support this
exhibit, the HCM suggests that the
results should not be used for operational analysis or final design.
What assumptions are used in the
service volume tables?
The service volumes for LOS A-E are given in HCM Exhibit 12-15 as a function
free-flow speed (45-65 mph) and the type of terrain (level, rolling
or mountainous). The terrain is very flat as is typical for all coastal
Florida highways. The free flow speed for this facility has been determined
from field observations as 55 mph. The design hour volume has been
determined from field observations as 1,110 vph.
What level of confidence do the results carry?
The results of the analysis carried out in this sub-problem is a function
of the changes that occur over the planning horizon for the analysis.
Considering the potential for development previously cited, it is likely
that the level of confidence for our analysis is low.
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