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Travel Time Reliability Reference Manual
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Contents
1
Introduction
2
National Performance Management Research Data Set (NPMRDS)
3
INRIX Data Set
4
Traffic Information and Condition Analysis System (TICAS)
5
Strategic Highway Research Program 2 (SHRP II)
Introduction
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About the Travel Time Reliability Reference Manual
Travel Time Reliability Indices
National Performance Management Research Data Set (NPMRDS)
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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
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About INRIX
INRIX Data Types
NPMRDS and INRIX Data Comparison
Traffic Information and Condition Analysis System (TICAS)
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About TICAS
Creating Routes
Primary use in SHRP II
Strategic Highway Research Program 2 (SHRP II)
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About SHRP II
TTRMS Tool
Surface Plots of non-recurring events
Surface Plots of travel time and VMT
Other travel time reliability plots