United States Department of Transportation
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Guidelines for project-level traffic forecasting for Hawaii Department of Transportation.
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2015-12-01
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[PDF-3.10 MB]
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Abstract:These guidelines describe both best practice and acceptable practice for performing project-level traffic
forecasts for the State of Hawaii. The guidelines describe a number of techniques and options that are all
acceptable within their intended scope, specific to the technique. Techniques include (1) Custom travel forecasts
using conventional three-step or four-step travel forecasting software; (2) Refinement of existing travel forecasts
or of new forecasts from existing models; and (3) Statistical analysis of time series. To the extent possible these
guidelines are consistent with national standards including the “Analytical Travel Forecasting Approaches for
Project Level Planning and Design,” NCHRP Report 765, which is an update of NCHRP Report 255.
Four extensive case studies were developed with HDOT data, case study 1 based on the Lahaina Bypass, case
study 2 based on the Saddle Road/West Side Defense Access Road (Daniel K. Inouye Highway), case study 3
which is a trends analysis on major highways, and case study 4 on models correlating ADT with other trends.
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