Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors
Passenger car equivalency (PCE) of heavy trucks is often studied using filed observation and microscopic simulation models, especially for signalized intersections. While the Highway Capacity Manual recommends a single value regardless of the percentage of those heavy vehicles, literatures have show...
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2021
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| Online Access: | http://hdl.handle.net/11073/23891 |
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| _version_ | 1864513436214362112 |
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| author | Ghanim, Mohammad Shareef |
| author2 | Abu-Lebdeh, Ghassan |
| author2_role | author |
| author_facet | Ghanim, Mohammad Shareef Abu-Lebdeh, Ghassan |
| author_role | author |
| dc.creator.none.fl_str_mv | Ghanim, Mohammad Shareef Abu-Lebdeh, Ghassan |
| dc.date.none.fl_str_mv | 2021 2022-05-25T09:37:48Z 2022-05-25T09:37:48Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | M.S. Ghanim and G. Abu-Lebdeh, Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors, International Journal of Transportation Science and Technology, https://doi.org/10.1016/j.ijtst.2021.07.002 2046-0430 http://hdl.handle.net/11073/23891 10.1016/j.ijtst.2021.07.002 |
| dc.language.none.fl_str_mv | en_US |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.relation.none.fl_str_mv | https://doi.org/10.1016/j.ijtst.2021.07.002 |
| dc.subject.none.fl_str_mv | Passenger car equivalency Heavy vehicles Congested traffic Signalized intersections Microsimulation |
| dc.title.none.fl_str_mv | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| dc.type.none.fl_str_mv | Peer-Reviewed Published version info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Passenger car equivalency (PCE) of heavy trucks is often studied using filed observation and microscopic simulation models, especially for signalized intersections. While the Highway Capacity Manual recommends a single value regardless of the percentage of those heavy vehicles, literatures have shown that this equivalency is affected by different factors, including the trucks percentage. This research aims to examine the PCE under different level of traffic and heavy trucks demands. First, field measurements were collected and used to examine the characteristics of heavy vehicle and passenger car headways in oversaturated interrupted flow conditions. Field observations were then used to calibrate a microscopic simulation model. The model was then used to evaluate impact on headways of different levels of congestion and heavy vehicle percentages. Field results show that truck headways are about 2.3 those of passenger cars. The results also show that trucks are 1.5 more likely to be first in a queue when compared to passenger cars and 1.7 times more likely to be in first four vehicles in a standing queue. Passenger cars immediately behind trucks had longer than average headway. The simulation results suggest that PCE increases nonlinearly with increase in congestion level and with percentage of trucks; PCE's increase becomes less marked once sever congestion (stop-and-go with increasing queue lengths) conditions set in. |
| format | article |
| id | aus_6a540374e1d90cde9eda42b99e2aa586 |
| identifier_str_mv | M.S. Ghanim and G. Abu-Lebdeh, Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors, International Journal of Transportation Science and Technology, https://doi.org/10.1016/j.ijtst.2021.07.002 2046-0430 10.1016/j.ijtst.2021.07.002 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/23891 |
| publishDate | 2021 |
| publisher.none.fl_str_mv | Elsevier |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factorsGhanim, Mohammad ShareefAbu-Lebdeh, GhassanPassenger car equivalencyHeavy vehiclesCongested trafficSignalized intersectionsMicrosimulationPassenger car equivalency (PCE) of heavy trucks is often studied using filed observation and microscopic simulation models, especially for signalized intersections. While the Highway Capacity Manual recommends a single value regardless of the percentage of those heavy vehicles, literatures have shown that this equivalency is affected by different factors, including the trucks percentage. This research aims to examine the PCE under different level of traffic and heavy trucks demands. First, field measurements were collected and used to examine the characteristics of heavy vehicle and passenger car headways in oversaturated interrupted flow conditions. Field observations were then used to calibrate a microscopic simulation model. The model was then used to evaluate impact on headways of different levels of congestion and heavy vehicle percentages. Field results show that truck headways are about 2.3 those of passenger cars. The results also show that trucks are 1.5 more likely to be first in a queue when compared to passenger cars and 1.7 times more likely to be in first four vehicles in a standing queue. Passenger cars immediately behind trucks had longer than average headway. The simulation results suggest that PCE increases nonlinearly with increase in congestion level and with percentage of trucks; PCE's increase becomes less marked once sever congestion (stop-and-go with increasing queue lengths) conditions set in.Elsevier2022-05-25T09:37:48Z2022-05-25T09:37:48Z2021Peer-ReviewedPublished versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfM.S. Ghanim and G. Abu-Lebdeh, Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors, International Journal of Transportation Science and Technology, https://doi.org/10.1016/j.ijtst.2021.07.0022046-0430http://hdl.handle.net/11073/2389110.1016/j.ijtst.2021.07.002en_UShttps://doi.org/10.1016/j.ijtst.2021.07.002oai:repository.aus.edu:11073/238912024-08-22T12:06:41Z |
| spellingShingle | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors Ghanim, Mohammad Shareef Passenger car equivalency Heavy vehicles Congested traffic Signalized intersections Microsimulation |
| status_str | publishedVersion |
| title | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| title_full | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| title_fullStr | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| title_full_unstemmed | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| title_short | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| title_sort | Characterization of heavy vehicle headways in oversaturated interrupted conditions: Towards development of passenger car equivalency factors |
| topic | Passenger car equivalency Heavy vehicles Congested traffic Signalized intersections Microsimulation |
| url | http://hdl.handle.net/11073/23891 |