ZHONG Peng-yun, YIN Hui. System dynamics simulation on spread of COVID-19 by traffic and transportation[J]. Journal of Traffic and Transportation Engineering, 2020, 20(3): 100-109. doi: 10.19818/j.cnki.1671-1637.2020.03.009
Citation: ZHONG Peng-yun, YIN Hui. System dynamics simulation on spread of COVID-19 by traffic and transportation[J]. Journal of Traffic and Transportation Engineering, 2020, 20(3): 100-109. doi: 10.19818/j.cnki.1671-1637.2020.03.009

System dynamics simulation on spread of COVID-19 by traffic and transportation

doi: 10.19818/j.cnki.1671-1637.2020.03.009
Funds:

National Natural Science Foundation of China 41501174

More Information
  • Author Bio:

    CHONG Peng-yun(1988-), male, senior engineer, PhD, chongzi512@foxmail.com

  • Received Date: 2020-04-08
  • Publish Date: 2020-06-25
  • To research the influence of traffic and transportation on the spread of corona virus disease 2019(COVID-19), the model of COVID-19 spreaded by traffic and transportation was established based on the system dynamics. Based on the hypothesis of model, the population was divided into the susceptible individual, explored individual, infected individual and removed individual. According to the spreading characteristics of COVID-19, the modified susceptible-explored-infected-removed(SEIR) and susceptible-explored-infected(SEI) spreading dynamics equations of COVID-19 of epidemic area, port, station, car, ship and related area were established under the influence of traffic and transportation. Based on the analysis of spread process of COVID-19 by traffic and transportation, a causal loop of the system dynamics model of traffic and transportation spreading the COVID-19 was drawn, and a causality feedback loop was analyzed. The model of COVID-19 spreaded by traffic and transportation was established based on the system dynamics, and the dimensional consistency, mechanical error, model validity, and extreme condition of the model were tested. Taking the City A as the research example, the influence of traffic and transportation on the spread of COVID-19 was researched by establishing three simulation scenarios. Simulation result shows that the number of individuals infected with the COVID-19 in City A reaches a peak on the 32 nd day after the outbreak, and 77 726 people were infected, and that of the area outside the City A reaches the peak on the 30 th day after the outbreak, and 28 084 people were infected. The traffic and transportation have positive feedback effects on the spread of COVID-19. The peak volumes of infected and removed individuals of COVID-19 under the influence of traffic and transportation are 18.62 and 10.99 times of those without the participation of traffic and transportation, respectively. Therefore, the traffic control measures have a positive effect on controlling the development and preventing the spread of COVID-19. The increase of public transport proportion will accelerate the spread of COVID-19. Therefore, reducing people's travel demands and the proportion of public transport, and increasing the virus elimination work of public transportation car, ship, port and station can effectively slow down the spread of COVID-19.

     

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