Project L33 Final Report

Overview

The goal of the SHRP 2 L33 Validation of Urban Freeways project is to assess and enhance the predictive travel time reliability models developed in the SHRP 2 L03 project, Analytical Procedures for Determining the Impacts of Reliability Mitigation Strategies. SHRP 2 L03, which concluded in 2010, developed two categories of reliability models to be used for the estimation or prediction of travel time reliability within planning, programming, and systems management contexts: data-rich and data-poor models.

The L33 project was tasked with (1) validating the data-rich and data-poor equations with new data sets; (2) assessing the validation outcomes to recommend potential enhancements; (3) exploring enhancements and developing a final set of predictive equations; (4) validating the enhanced models; and (5) developing a clear set of application guidelines for practitioners to use with the project outputs.

The work outputs of this project include a set of recalibrated data-poor models, a set of enhanced data-rich models, and revised application guidelines for using the models.

Operations Area of Practice

    SHRP2 Tools
    Simulation Analysis
    Data Acquisition, Support and Hosting
    Traffic Incident Management

Organizational Capability Element

    Traffic Incident Management

Content Type

Research

Role in Organization

Transportation Planner
Public
Senior Engineer
Researcher/Academic
Principal Engineer
Manager / First Line Supervisor
Director / Program Manager
CEO / GM / Commissioner
Engineer
Senior Manager
Transit Professional
Associate Engineer

Publishing Organization

SHRP2 Program

Document Downloads

Project Website

TOM Chapters
6.5
20.1
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