Wang, X., Khlystov, A. Y., Ho, K. F., Campbell, D. E., Chow, J. C., Kohl, S. D., Watson, J. G., Lee, Shuncheng, Chen, L.-W.A., Lu, M., Ho, S.S.H. (2018). Real-world Vehicle Emission Characterization for the Shing Mun Tunnel in Hong Kong and Ft. McHenry Tunnel in the U.S., Health Effects Institute: Boston, MA, Draft final report.