References
- Agarwal, M. K., M. C. Swanson, C. E. Reed, and J. W. Yunginger. 1984. Airborne ragweed allergens: association with various particle sizes and short ragweed plant parts. J. Allergy Clin. Immunol. 74 (5):687–93. Forty-first Annual Meeting . doi: 10.1016/0091-6749(84)90231-8.
- ANSI/ASHRAE 2017. ANSI/ASHRAE test standard 52.2, Appendix A4. A4 https://www.ashrae.org/technical-resources/standards-and-guidelines.
- APTA 2020a. The COVID-19 pandemic, public transportation responds: safeguarding riders and employees. American Public Transportation Association. https://www.apta.com/wp-content/uploads/COVID-19_Transit_Guide_REVISON-2020_08_11.pdf.
- APTA 2020b. Ridership report. American Public Transportation Association. https://www.apta.com/research-technical-resources/transit-statistics/ridership-report/.
- Arens, E., H. Zhang, T. Hoyt, S. Kaam, F. Bauman, Y. Zhai, G. Paliaga, J. Stein, R. Seidl, B. Tully, et al. 2015. Effects of diffuser airflow minima on occupant comfort, air mixing, and building energy use (RP-1515). Sci. Technol. Built Environ. 21 (8):1075–90. doi: 10.1080/23744731.2015.1060104.
- Bushwick, S., T. Lewis, and A. Montañez. 2020. Evaluating COVID risk on planes, trains and automobiles. Scientific American, November 19, 2020. https://www.scientificamerican.com/article/evaluating-covid-risk-on-planes-trains-and-automobiles2/.
- Delca Corp. 2020. ThinkDog masks. December 18, 2020. http://www.delcacorp.com/hm/masks.
- Delta Air. 2020. Setting the standard for safer travel | Delta Air Lines. September 10, 2020. https://www.delta.com/global/en/travel-update-center/ways-we-are-keeping-you-safe/setting-the-standard-for-safer-travel.
- Dzisi, E. K. J., and O. A. Dei. 2020. Adherence to social distancing and wearing of masks within public transportation during the COVID 19 pandemic. Transp. Res. Interdiscip. Perspect. 7: 100191. doi: 10.1016/j.trip.2020.100191.
- Edwards, N. J., B. Colder, J. Sullivan, and L. Naramore. 2021. A practical approach to indoor air quality for municipal public health and safety. OJPS 11 (01):176–91. doi: 10.4236/ojps.2021.111012.
- Edwards, N. J., R. Widrick, R. Potember, and M. Gerschefske. 2020. Quantifying respiratory airborne particle dispersion control through improvised reusable masks: the physics of non-pharmaceutical interventions for reducing SARS-CoV-2 (COVID-19) airborne transmission. J. Nanotechnol. Nanomater. 1 (3):116–28. doi: 10.33696/Nanotechnol.1.015.
- FTA. 2020. National transit database (NTD). U.S. DOT federal transit administration. https://www.transit.dot.gov/ntd/ntd-data.
- Goldbaum, C. 2020. Is the subway risky? It may be safer than you think. The New York Times, August 2, 2020, sec. New York. https://www.nytimes.com/2020/08/02/nyregion/nyc-subway-coronavirus-safety.html.
- Gurley, G. 2020. Reducing risks in the air on buses. The American Prospect. July 15, 2020. https://prospect.org/api/content/a6966128-c63b-11ea-8a7f-1244d5f7c7c6/.
- Herguth, R., and C. Hurley. 2020. Nearly 900 CTA workers have had COVID-19; 18 of them drove the busy no. 79 or No. 49 bus routes. Chicago Sun-Times. December 11, 2020. https://chicago.suntimes.com/2020/12/11/22166210/cta-covid-coronavirus-bus-drivers-routes-rail-operators-amalgamated-transit-union-local-241-covid19.
- Hui, D. S., B. K. Chow, L. Chu, S. S. Ng, N. Lee, T. Gin, and M. T. V. Chan. 2012. Exhaled air dispersion during coughing with and without wearing a surgical or N95 mask. PloS One 7 (12):e50845. doi: 10.1371/journal.pone.0050845.
- Huston, L. 2009. TCRP Transit IDEA J-04/IDEA 53: Ultraviolet germicidal irradiation for transit buses. National Academies Transportation Research Board. https://www.trbtss.org/?p=2131.
- Hwang, G. M., A. A. DiCarlo, and G. C. Lin. 2011. An analysis on the detection of biological contaminants aboard aircraft. PLOS One. 6 (1):e14520. doi: 10.1371/journal.pone.0014520.
- JHU. 2020. Cumulative cases. Johns Hopkins University & Medicine. https://coronavirus.jhu.edu/data/cumulative-cases.
- Lindsley, W. G., W. P. King, R. E. Thewlis, J. S. Reynolds, K. Panday, G. Cao, and J. V. Szalajda. 2012. Dispersion and exposure to a cough-generated aerosol in a simulated medical examination room. J. Occup. Environ. Hyg. 9 (12):681–90. doi: 10.1080/15459624.2012.725986.
- Lindsley, W. G., J. S. Reynolds, J. V. Szalajda, J. D. Noti, and D. H. Beezhold. 2013. A cough aerosol simulator for the study of disease transmission by human cough-generated aerosols. Aerosol Sci. Technol. 47 (8):937–44. doi: 10.1080/02786826.2013.803019.
- Löhner, R. 2020. Pictures and videos/movies from simulations: Covid-19/spread of diseases in the built environment. December 31, 2020. https://cfd.gmu.edu/%7Erlohner/pages/pics/covid19.html.
- Luo, K., Z. Lei, Z. Hai, S. Xiao, J. Rui, H. Yang, X. Jing, H. Wang, Z. Xie, P. Luo, et al. 2020. Transmission of SARS-CoV-2 in public transportation vehicles: a case study in Hunan Province, China. Open Forum Infect. Dis. 7 (10):ofaa430. doi: 10.1093/ofid/ofaa430.
- McGovern, J.-P. 2021. Active air purification is a transit weapon against COVID. BUSRide, February 1, 2021. https://busride.com/keeping-transportation-safe-post-covid/.
- Mittal, R., C. Meneveau, and W. Wu. 2020. A mathematical framework for estimating risk of airborne transmission of COVID-19 with application to face mask use and social distancing. Phys. Fluids (1994) 32 (10):101903. doi: 10.1063/5.0025476.
- Mobile Climate Control. 2020. MCC COVID-19 Recommendations. https://www.mcc-hvac.com/mobile-climate-control-mcc-covid-19-recommendations/.
- National Academies of Sciences, Engineering, and Medicine. 2021. A pandemic playbook for transportation agencies. Washington, DC: The National Academies Press. doi: 10.17226/26145.
- NOAA. 2001. Wind chill chart. US Department of Commerce. https://www.weather.gov/safety/cold-wind-chill-chart.
- Pariseau, D. 2019. Air quality instrumentation: Part III – particle mass (PM) estimation. https://particlesplus.com/air-quality-instrumentation-part-iii-particle-mass-pm-estimation/.
- Ramirez, D. W. E., M. D. Klinkhammer, and L. C. Rowland. 2021. COVID-19 transmission during transportation of 1st to 12th grade students: experience of an independent school in Virginia. J. School Health. 91 (9):678–682. doi: 10.1111/josh.13058.
- Riley, E. C., G. Murphy, and R. L. Riley. 1978. Airborne spread of measles in a suburban elementary school. Am. J. Epidemiol. 107 (5):421–32. doi: 10.1093/oxfordjournals.aje.a112560.
- Rorres, N. 2020. Airflow through buses. Denver, CO: Regional Transportation District (RTD). https://www.rtd-denver.com/sites/default/files/files/2020-10/Airflow%20Through%20Buses.pdf.
- Rothenberg, M., D. Miller, R. Molitor, and D. Leffingwell. 1987. The control of air flow during loud soprano singing. J. Voice 1 (3):262–8. doi: 10.1016/S0892-1997(87)80010-3.
- Schwartz, S. 2020. Public transit and COVID-19 pandemic: global research and best practices. American Public Transportation Association. https://www.apta.com/research-technical-resources/research-reports/public-transit-and-covid-19-pandemic-global-research-and-best-practices/.
- Shen, Y., C. Li, H. Dong, Z. Wang, L. Martinez, Z. Sun, A. Handel, Z. Chen, E. Chen, M. H. Ebell, et al. 2020. Community outbreak investigation of SARS-CoV-2 transmission among bus riders in eastern China. JAMA Int. Med. 180 (12):1665–1671. doi: 10.1001/jamainternmed.2020.5225.
- Silcott, D., S. Kinahan, J. Santarpia, B. Silcott, R. Silcott, P. Silcott, B. Silcott, S. Distelhorst, V. Herrera, D. Rivera, et al. 2020. TRANSCOM/AMC commercial aircraft cabin aerosol dispersion tests. United States Transportation Command (USTRANSCOM) & Air Mobility Command (AMC). https://www.ustranscom.mil/cmd/docs/TRANSCOM%20Report%20Final.pdf.
- Stewart, E. J., L. J. Schoen, K. Mead, R. N. Olmsted, C. Sekhar, W. Vernon, J. Pantelic, Y. Li, Z. M. Sultan, and W. Conlan. April 14, 2020. ASHRAE Position Document on Infectious Aerosols. https://www.ashrae.org/file%20library/about/position%20documents/pd_infectiousaerosols_2020.pdf.
- Sze To, G. N., and C. Y. H. Chao. 2010. Review and comparison between the Wells-Riley and dose-response approaches to risk assessment of infectious respiratory diseases . Indoor Air. 20 (1):2–16. doi: 10.1111/j.1600-0668.2009.00621.x.
- Takahashi, Y., M. Sakaguchi, M. von-Pfaler, and G. el-Ghazaly. 2003. Relationship between numbers of birch pollen and different particle sizes of the pollen antigens (Bet v) in the air in Stockholm, Sweden. Allergol. Int. 52 (2):111–4. doi: 10.1046/j.1440-1592.2003.00285.x.
- Tawfik, A. 2020. COVID-19 public transportation air circulation and virus mitigation study. http://fresnostate.edu/engineering/institutes/fsti/news/covidfsti.html.
- Tirachini, A., and O. Cats. 2020. COVID-19 and public transportation: current assessment, prospects, and research needs. J. Public Trans. 22 (1):1–22. doi: 10.5038/2375-0901.22.1.1.
- USBR 2006. Design guide for heating, ventilating, and air conditioning systems. U.S. Department of the Interior Bureau of Reclamation. https://www.usbr.gov/tsc/techreferences/mands/mands-pdfs/HVACManl.pdf.
- Weis, D. D., and G. E. Ewing. 1999. Water content and morphology of sodium chloride aerosol particles. J. Geophys. Res. 104 (D17):21275–85. doi: 10.1029/1999JD900286.
- Wise, M. E., T. A. Semeniuk, R. Bruintjes, S. T. Martin, L. M. Russell, and P. R. Buseck. 2007. Hygroscopic behavior of NaCl-bearing natural aerosol particles using environmental transmission electron microscopy. J. Geophys. Res. 112 (D10). doi: 10.1029/2006JD007678.
- Zangmeister, C. D., J. G. Radney, E. P. Vicenzi, and J. L. Weaver. 2020. Filtration efficiencies of nanoscale aerosol by cloth mask materials used to slow the spread of SARS-CoV-2. ACS Nano. 14 (7):9188–200. doi: 10.1021/acsnano.0c05025.
- Zhang, Z., T. Han, K. H. Yoo, J. Capecelatro, A. L. Boehman, and K. Maki. 2021. Disease transmission through expiratory aerosols on an urban bus. Phys Fluids (1994) .) 33 (1):015116. doi: 10.1063/5.0037452.
- Zheng, R., Y. Xu, W. Wang, G. Ning, and Y. Bi. 2020. Spatial transmission of COVID-19 via public and private transportation in China. Travel Med. Infect. Dis. 34:101626. doi: 10.1016/j.tmaid.2020.101626.