Microscopic Analysis of Traffic Flow in Inclement Weather

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dc.contributorVirginia Tech Transportation Instituteen
dc.contributorCostello, Seosamh B.en
dc.contributor.authorRakha, Hesham A.en
dc.contributor.authorKrechmer, Danielen
dc.contributor.authorCordahi, Gustaveen
dc.contributor.authorZohdy, Ismail H.en
dc.contributor.authorSadek, Shereefen
dc.contributor.authorArafeh, Mohamadrezaen
dc.date.accessed2015-06-25en
dc.date.accessioned2015-07-31T20:05:16Zen
dc.date.available2015-07-31T20:05:16Zen
dc.date.issued2009-11en
dc.description.abstractWeather causes a variety of impacts on the transportation system. An Oak Ridge National Laboratory study estimated the delay experienced by American drivers due to snow, ice, and fog in 1999 at 46 million hours. While severe winter storms, hurricanes, or flooding can result in major stoppages or evacuations of transportation systems and cost millions of dollars, the day-to-day weather events such as rain, fog, snow, and freezing rain can have a serious impact on the mobility and safety of the transportation system users. Despite the documented impacts of adverse weather on transportation, the linkages between inclement weather conditions and traffic flow in existing analysis tools remain tenuous. This is primarily a result of limitations on the data used in research activities. The scope of this research included use of empirical data, where available, to estimate weather impacts on three categories of sub models related to driver behavior, longitudinal vehicle motion models (acceleration, deceleration and car-following models), lane-changing models and gap acceptance models. Empirical data were used to estimate impacts of adverse weather on longitudinal and gap acceptance models but no suitable datasets were identified for lane changing models. Existing commercial microsimulation software packages were then reviewed to identify whether and how weather-related factors could be utilized in these models. The various sub models used in these packages to estimate longitudinal motion, lane-changing and gap acceptance models were evaluated. The research found that for the most part, weather-related factors could be incorporated into these models, although the techniques vary by package and by type of model. Additional empirical research is needed to provide confidence in weather-related adjustment factors, particularly as relates to ice and snow. This report concludes with some recommendations of future research related to weather and traffic flow. Additional work is proposed related to human factors and microscopic traffic modeling.en
dc.description.sponsorshipUnited States. Department of Transportation. Research and Innovative Technology Administrationen
dc.format.extent119 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRakha, H. A., Kamalanathsharma, R. K., & Ahn, K. (2012). Aeris : Eco-vehicle speed control at signalized intersections using i2v communication. (FMCSA-RRR-11-015). Washington, DC: United States. Joint Program Office for Intelligent Transportation Systems. Retrieved from http://ntl.bts.gov/lib/46000/46300/46329/FHWA-JPO-12-063_FINAL_PKG.pdf.en
dc.identifier.govdocFHWA-JPO-09-066en
dc.identifier.urihttp://hdl.handle.net/10919/55101en
dc.identifier.urlhttp://ntl.bts.gov/lib/32000/32500/32539/tfiw_final.pdfen
dc.language.isoenen
dc.publisherUnited States. Federal Highway Administrationen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectWeatheren
dc.subjectTraffic flowen
dc.subjectStatistical modelsen
dc.subjectHuman factorsen
dc.subjectMicrosimulationen
dc.titleMicroscopic Analysis of Traffic Flow in Inclement Weatheren
dc.typeGovernment documenten
dc.type.dcmitypeTexten

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