Travel Time Reliability Reference Manual

Travel Time Reliability

Reference Manual

Table of Contents

Introduction

• About the Travel Time Reliability Reference Manual
• Travel Time Reliability Indices

National Performance Management Research Data Set (NPMRDS)

• About NPMRDS
• Accessing the Data
• Data Format and Size
• Data Storage
• Building Corridors
• Availability of Real-Time Data
• Calculating Speeds and Travel Times
• Imputing Missing Speed Data
• NPMRDS and INRIX Data Comparison
• Example Data

INRIX Data Set

• About INRIX
• INRIX Data Types
• NPMRDS and INRIX Data Comparison

Traffic Information and Condition Analysis System (TICAS)

• About TICAS
• Creating Routes
• Primary use in SHRP II

Strategic Highway Research Program 2 (SHRP II)

• About SHRP II
• TTRMS Tool
• Surface Plots of non-recurring events
• Surface Plots of travel time and VMT
• Other travel time reliability plots