White Paper on Percentile-based Route PDFs from Segment PDFs

Overview

This white paper describes an acceptable process for creating distributions of travel times for a route from distributions of the segments that compose said route. It has long been generally accepted by experts in traffic flow analysis, including statisticians, that the variability of travel time for a segment cannot be determined by summing the variability in travel time of sections comprising the segment.

Operations Area of Practice

    Detection Systems
    SHRP2 Tools
    Communicating Reliability Information
    Simulation Analysis
    Data Acquisition, Support and Hosting
    System Performance Definition, Monitoring and Reporting
    Travel Demand Forecasting

Content Type

Research

Role in Organization

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

Publishing Organization

SHRP2 Program

Document Downloads

TOM Chapters
6.5
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