| Title | Establishing Monitoring Programs for Travel Time Reliability |
|---|---|
| Record ID | 61934 |
| Personal Name Creator |
List, George F.; Williams, Billy M.; Rouphail, Nagui M.; Hranac, Rob; Barkley, Tiffany; Mai, Eric; Ciccarelli, Armand; Rodegerdts, Lee; Pincus, Katie; Nevers, Brandon; Karr, Alan F.; Zhou, Xuesong; Wojtowicz, Jeffrey; Schofer, Joseph L.; Khattak, Asad J. |
| Corporate Creator | North Carolina State University. Institute for Transportation Research & Education; Kittelson & Associates, Inc; University of Utah; Rensselaer Polytechnic Institute; Northwestern University (Evanston, Ill.); Iteris/Berkeley Transportation Systems, Inc.; National Institute of Statistical Sciences; Planitek; Second Strategic Highway Research Program (U.S.) |
| Corporate Contributor |
National Research Council (U.S.). Transportation Research Board; United States. Federal Highway Administration; American Association of State Highway and Transportation Officials (AASHTO) |
| Publisher | National Research Council (U.S.). Transportation Research Board |
| Publication Date | 20140000 |
| Language | English |
| Abstract | Within the second Strategic Highway Research Program (SHRP 2), Project L02 focused on creating a suite of methods by which transportation agencies could monitor and evaluate travel time reliability. Creation of the methods also produced an improved understanding of why and how travel times vary and the factors that create that variation. This final report provides a brief narrative about what reliability is and how it can be measured and analyzed. A general finding is that reliability is best described by creating holistic pictures like probability density functions (PDFs) and their associated cumulative density functions (CDFs). PDFs are helpful for identifying multimodality or the existence of multiple operating conditions within the data being examined. CDFs are helpful for seeing if progress is being made in making a system more reliable or for comparing the reliability of one system against another. After an introductory chapter, chapters in this report address: a survey of existing systems and user needs; functional specifications; data collection, assembly, and cleaning; sensor spacing and sampling for travel time reliability monitoring; data processing and analysis; and case studies. The last chapter provides a summary and conclusions. For supporting datasets, please see https://rosap.ntl.bts.gov/view/dot/3602 |
| Rosap ID | dot:4039 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/4039 |
| TRT Terms | Case studies; Data collection; Data quality; Highway travel; Sensors; Traffic surveillance; Travel time; Intelligent transportation systems |
| General Subjects | Strategic Highway Research Program 2 (SHRP2); travel time reliability |
| Geographical Coverage |
United States; California; New York; Virginia; New Jersey; San Diego (California); Sacramento (California); Atlanta (Georgia) |
| ISBN | 9780309272865 |
| Report Number | S2-L02-RR-1 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/61000/61900/61934/List_Establishing_Monitoring_Travel_Time_Reliability_SHRP2_L02_2014_Final_Report.pdf |
| Format | |
| Database | NTL Digital Repository |