Due to the increased outdoor transmission risk of new SARS-COV-2 variants, the
health of urban residents in daily travel is being threatened. In the new normal
of long-term coexistence with SARS-CoV-2, how to avoid being infected by
SARS-CoV-2 in daily travel has become a key issue. Hence, a spatiotemporal
solution has been proposed to assist healthy travel route planning. Firstly, an
enhanced urban-community-scale geographic model was proposed to predict daily
COVID-19 symptom onset risk by incorporating the real-time effective
reproduction numbers, and daily population variation of fully vaccinated.
On-road onset risk predictions in the next following days were then extracted
for searching healthy routes with the least onset risk values. The healthy route
planning was further implemented in a mobile application. Hong Kong, one of the
representative highly populated cities, has been chosen as an example to apply
the spatiotemporal solution. The application results in the four epidemic waves
of Hong Kong show that based on the high accurate prediction of COVID-19 symptom
onset risk, the healthy route planning could reduce people’s exposure to the
COVID-19 symptoms onset risk. To sum, the proposed solution can be applied to
support the healthy travel of residents in more cities in the new normalcy.