Chaoyi Gu
Texas A&M Transportation Institute
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Featured researches published by Chaoyi Gu.
Transportation Research Record | 2018
Chaoyi Gu; Reza Farzaneh; Geza Pesti; Gabriel Valdez; Andrew G. Birt
Shifting work zones from daytime to nighttime is a potential solution to air quality issues on roadway with high traffic volume and where it is undesirable to close lanes during peak hours. The expected benefit of such shifting is to reduce total fuel consumption and on-road vehicle emissions. However, the magnitude of emission reductions and air quality impacts has not been examined comprehensively at work zones. The study presented in this paper investigated the traffic-related emission impacts of work zones using an urban freeway case study. A VISSIM test bed combined with the Environmental Protection Agency’s MOVES emission model was used to estimate total emissions assuming daytime and nighttime lane-closure scenarios. Vehicle emissions were estimated using a link-based method and operating mode-based method. The results from both methods demonstrated that nighttime construction has a significant impact on both traffic speeds and vehicle emissions, primarily as a result of reductions in vehicle miles traveled. In addition, a horizontal comparison between the results from the two methods was made to assess the impact of different emission estimation approaches. The outcomes from the comparison highlight the potential importance of the operating mode-based approach for accurately estimate total traffic emission quantities when data or simulations are available.
Transportation Research Board 97th Annual MeetingTransportation Research Board | 2018
Reza Farzaneh; Chaoyi Gu; Geza Pesti; Gabriel Valdez; Andrew G. Birt; Jeffrey Shelton
Transportation Research Board 97th Annual MeetingTransportation Research Board | 2018
Chaoyi Gu; Reza Farzaneh; Geza Pesti; Gabriel Valdez; Andrew G. Birt
Transportation Research Board 96th Annual MeetingTransportation Research Board | 2017
Reza Farzaneh; Andrew G. Birt; Jeremy Johnson; Chaoyi Gu; Sarah Overmyer
Transportation Research Board 95th Annual MeetingTransportation Research Board | 2016
Mohamadreza Farzaneh; Jeremy Johnson; Doh-Won Lee; Chaoyi Gu; Tara Ramani
Transportation Research Board 94th Annual MeetingTransportation Research Board | 2015
Reza Farzaneh; Chaoyi Gu; Nick Wood; Josias Zietsman
Transportation Research Board 94th Annual MeetingTransportation Research Board | 2015
Reza Farzaneh; Tyler Fossett; Jon Williams; Chaoyi Gu; Nick Wood; Josias Zietsman
Archive | 2014
Mohamadreza Farzaneh; Josias Zietsman; Doh-Won Lee; Jeremy Johnson; Nick Wood; Tara Ramani; Chaoyi Gu
Archive | 2014
Reza Farzaneh; Yuche Chen; Jeremy Johnson; Josias Zietsman; Chaoyi Gu; Tara Ramani; L.D. White; Megan Kenney; Yue Zhang
Archive | 2014
Reza Farzaneh; Yuche Chen; Jeremy Johnson; Josias Zietsman; Chaoyi Gu; Tara Ramani; L.D. White; Megan Kenney; Yue Zhang