Types of relationship between regional traffic and COVID-19
In Table 3 the analyses in Table 2, Figure 4, and Figure 5 have been classified into types for each region, based on whether the trends in traffic and COVID-19 were increasing or decreasing. Incheon was categorized as a region requiring strong control (Type 1), with increasing trends for both COVID-19 spread and traffic. Gyeonggi and Seoul were categorized as regions in the early stages of focused control or requiring control (Type 2), with increasing traffic but a relatively stable trend for new confirmed COVID-19 cases. The other regions were categorized as stable (Type 3), with increasing traffic but decreasing trends for COVID-19 spread.
Table 3 The level of relationship between traffic and COVID-19 in cities, 2020.
Trend in 2020 Specific City
Level Traffic COVID-19
1 + + (Danger) Strong control required Incheon
2 0 (Caution) Control required, or in the early stage of focused control Gyeonggi, Seoul
3 − (Stable) Under stable control Daegu, Busan, Gwangju, Daejeon, Ulsan, Sejong, Chungbuk, Chungnam, Jeonbuk, Jeonnam, Gyeongbuk, Gyeongnam
+ = increasing; 0 = same; − = decreasing.