Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=gtpt20 Transportation Planning and Technology ISSN: 0308-1060 (Print) 1029-0354 (Online) Journal homepage: http://www.tandfonline.com/loi/gtpt20 Modeling and optimizing urban bus transit considering headway variation for cost and service reliability analysis Liuhui Zhao, Steven I. Chien, Lazar N. Spasovic & Xiaobo Liu To cite this article: Liuhui Zhao, Steven I. Chien, Lazar N. Spasovic & Xiaobo Liu (2018): Modeling and optimizing urban bus transit considering headway variation for cost and service reliability analysis, Transportation Planning and Technology, DOI: 10.1080/03081060.2018.1504181 To link to this article: https://doi.org/10.1080/03081060.2018.1504181 Published online: 29 Jul 2018. Submit your article to this journal View Crossmark data