Time Headway and Platooning Characteristics of Vehicles on Interstate Highways
Sadeghhosseini, Sedigheh
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https://hdl.handle.net/2142/83185
Description
Title
Time Headway and Platooning Characteristics of Vehicles on Interstate Highways
Author(s)
Sadeghhosseini, Sedigheh
Issue Date
2002
Doctoral Committee Chair(s)
Benekohal, Rahim F.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, System Science
Language
eng
Abstract
Mean time headway for platooning vehicles decreased as traffic volume increased. About 18% to 31% of platooning vehicles had a space gap that corresponds to a reaction time of 0.5 second or less, with more than half of these in large platoon of 5 vehicles or more. About 15% to 85% of platooning vehicles were in large platoons. For left and right lanes, platoons led by heavy vehicles were moving at slower speeds than platoons led by light vehicles. Proportion of vehicles in platoon on right lane was significantly higher than that on left lanes. Proportions of heavy vehicles leading platoons in right lanes were significantly higher than that for left lanes. Mean headways of platooning vehicles in right lanes were significantly higher than that in left lanes. Mean platoon sizes in left lanes were significantly higher than that in right lanes. In two out of three data sets for left lanes, light vehicles following heavy vehicles, and heavy vehicles following light vehicles kept longer headways than light vehicles following light vehicles. For right lanes, for two out of three data sets light vehicles following heavy vehicles maintained longer headways than heavy or light vehicles following light vehicles.
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