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Developing and Field Testing a Green Light Optimal Speed Advisory System for Buses

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dc.contributor.authorChen, Haoen
dc.contributor.authorRakha, Hesham A.en
dc.date.accessioned2022-02-25T13:46:50Zen
dc.date.available2022-02-25T13:46:50Zen
dc.date.issued2022-02-17en
dc.date.updated2022-02-24T14:49:55Zen
dc.description.abstractIn this study, a Green Light Optimal Speed Advisory (GLOSA) system for buses (B-GLOSA) was developed. The proposed B-GLOSA system was implemented on diesel buses, and field tested to validate and quantify the potential real-world benefits. The developed system includes a simple and easy-to-calibrate fuel consumption model that computes instantaneous diesel bus fuel consumption rates. The bus fuel consumption model, a vehicle dynamics model, the traffic signal timings, and the relationship between vehicle speed and distance to the intersection are used to construct an optimization problem. A moving-horizon dynamic programming problem solved using the A-star algorithm is used to compute the energy-optimized vehicle trajectory through signalized intersections. The Virginia Smart Road test facility was used to conduct the field test on 30 participants. Each participant drove three scenarios, including a base case uninformed drive, an informed drive with signal timing information communicated to the driver, and an informed drive with the recommended speed computed by the B-GLOSA system. The field test investigated the performance of using the developed B-GLOSA system considering different impact factors, including road grades and red indication offsets, using a split-split-plot experimental design. The test results demonstrated that the proposed B-GLOSA system can produce smoother bus trajectories through signalized intersections, thus producing fuel consumption and travel time savings. Specifically, compared to the uninformed drive, the B-GLOSA system produces fuel and travel time savings of 22.1% and 6.1%, on average, respectively.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationChen, H.; Rakha, H.A. Developing and Field Testing a Green Light Optimal Speed Advisory System for Buses. Energies 2022, 15, 1491.en
dc.identifier.doihttps://doi.org/10.3390/en15041491en
dc.identifier.urihttp://hdl.handle.net/10919/108859en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjecteco-drivingen
dc.subjectGLOSAen
dc.subjectsignalized intersectionen
dc.subjectdiesel busen
dc.subjecteco-cooperative adaptive cruise controlen
dc.subjectfuel consumption modelen
dc.subjectfield testen
dc.titleDeveloping and Field Testing a Green Light Optimal Speed Advisory System for Busesen
dc.title.serialEnergiesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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Journal Articles, Multidisciplinary Digital Publishing Institute (MDPI)
Scholarly Works, Civil and Environmental Engineering
Scholarly Works, Virginia Tech Transportation Institute