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Accession Number PB2013-105231
Title Travel Time Based Congestion Measures for Freeway Corridors.
Publication Date Jun 2010
Media Count 40p
Personal Author M. Chen
Abstract Travel time based mobility measures have been increasingly used in highway performance analyses. Among them, Travel Time Index (TTI), Planning Time Index (PTI), percentage of travel under congestion (PTC), and buffer index (BI) have been identified as measures of particular interests in Kentucky. The objectives of this study are: (1) Calculate TTI, PTI, PTC, and BI for freeways within the TRIMARC coverage; and (2) Explore potential correlation between the reliability measures and incident characteristics (e.g., number of incidents, duration, severity, etc.). These analyses were performed for the years 2006-8 for each monitored segment and freeway corridor as well as for the entire freeway system.
Keywords Buffer Index(BI)
Congestion measures
Percentage of Travel under Congestion(PTC)
Planning Time Index(PTI)
Travel time
Travel Time Index(TTI)

Source Agency Federal Highway Administration
NTIS Subject Category 50A - Highway Engineering
85H - Road Transportation
91B - Transportation & Traffic Planning
Corporate Author Kentucky Transportation Center, Lexington. College of Engineering.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1312
Contract Number N/A

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