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Getting Started
Problem 1
Problem 2
Problem 3
Problem 4
Problem 5
Problem Index

Overview - Page 2 of 2

ID# C4OV002


We’re going to consider these issues and others through a series of five problems. Each one illustrates different facets of the deficiency analysis. Each one also illustrates how the various traffic analysis tools in the Highway Capacity Manual can be applied to assist traffic analysts, engineers, planners, and decision-makers in making sound investment decisions regarding changes to a transportation system.

The problems focus on the chapters of the HCM that deal with uninterrupted facilities. We start with basic freeway sections, then go on to weaving sections and ramps, apply the freeway systems methodology to the NY-7 portion of the subarea network, and conclude with a simulation model for the subarea as a whole. After working through this material, you should be able to:


Determine the appropriate analyses required to address a problem similar to what is presented in this case study. This includes the physical scope of the area to be included in the analysis and selecting the appropriate analysis.


Understand what input data are required and the assumptions that are commonly made regarding default values for the HCM procedures for these facilities.


Understand when and how to apply the methodologies for basic freeway sections, weaving sections, ramps, and freeway systems.


Understand the limitations of the HCM procedures and when it is appropriate to use other models or computational tools.


Know how to reasonably interpret the results from an HCM analysis and how these results can be used to support a particular decision regarding changes to a transportation system.

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