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Introduction

Project-level traffic forecasting is a specialized set of techniques to better make forecasts over short time horizons, typically by using ground data along with other methodologies. Project-level traffic forecasting became well established with the publication of NCHRP Report 255, which was itself updated by NCHRP Report 765. The "Hawaii Guidelines" are a rewritten version of much of the material in NCHRP Report 765, and these guidelines form the basis for this article.

Outline

Purpose

Forecasting process

Quality assurance and validation standards

Choice of techniques