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Sub-problem 3a: Analysis of the North Section of Krome Avenue (Class I Two-lane Highway)

The procedures given in HCM Chapter 20 will be applied to this section of Krome Avenue.

Exhibit 3-18. LOS Thresholds for Class I Two-Lane Highways
LOS Percent Time-Spent-Following Average Travel Speed (mph)
A <35 >55
B 35-50 51-55
C 51-65 46-50
D 66-80 40-45
E >80 <40

What is the additional data that will be applied in the operations procedure? The additional data (i.e., beyond the sub-problem 2a requirements) include:

  • percent trucks

  • directional distribution

  • percent no passing zones

  • shoulder width

  • lane width

  • PHF

  • access points per mile

  • segment length

The last item, segment length, is not actually required for estimation of LOS, but it is used for calculation of travel time and vehicle-miles of travel. All of these data items with their associated sources and assumptions were discussed in the Getting Started section of this case study.

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