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Introduction
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The HCMAG includes some discussion of
basic concepts and terminology (for example, signal phase sequencing
nomenclature), but presumes the user is already familiar with these concepts
and has access to generally-used resource documents like the
Manual on Uniform Traffic Control
Devices and the American Association of State Highway Transportation
Officials (AASHTO) Policy
on Geometric Design. It also presumes the user has access to the HCM,
and therefore does not repeat the step-wise application technique for each
analysis methodology that is already described in the HCM.
This Guidebook is intended to be a
supplemental resource document to the HCM that can be used in a variety of
ways:
 |
It can provide guidance on how to
approach, execute, and interpret the results of a facility-specific
analysis that the user might need to undertake. |
|
It can offer insights into specific
areas of the analysis where special care should be taken to ensure that
the analysis results reasonably and appropriately address the issues of
concern. |
|
It can identify and characterize the
interactions that one facility type can have on other adjacent or nearby
facility types. |
| It can provide example data sets and prototypical
analysis procedures that can be used as templates for addressing other
similar real-world problems that the user might encounter. |
As a companion tool to the HCM,
commercial software is available to perform the numerical calculations for
the analysis procedures. All of the HCM computational results presented in
the HCMAG were produced and independently verified by at least two widely
distributed software products that purport to implement the HCM procedures
faithfully. In all cases where HCM procedures were applied, the analysis
results are presented in a software-independent format, reflective of the
fact that the HCMAG does not and cannot judge the fidelity of any software
package.
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