Table 1.

Average traffic per day in 2019 and 2020, and COVID-19 trend per day in 2020.

Date	Traffic average per day		Gapa (%)b	Daily new confirmed cases (N)	Released from isolation
	2019	2020
Jan – 1st week	145 797 502	135 994 670	−9 802 832 (−6.7%)	0	0
Jan – 2nd week	149 049 737	148 389 105	−660 632 (−0.4%)	0	0
Jan – 3rd week	150 897 726	146 908 915	−3 988 811 (−2.6%)	1	0
Jan – 4th week	149 778 529	185 314 734	+25 844 728 (+17.3%)	10	0
Jan – 5th week	147 251 673	150 482 955	+3 231 282 (+2.2%)	7	0
Feb – 1st week	182 825 475	140 144 295	−42 681 180 (−23.3%)	6	2
Feb – 2nd week	162 747 801	165 831 722	+3 083 921 (+1.9%)	4	7
Feb – 3rd week	151 192 280	142 631 273	−8 561 006 (−5.7%)	176	18
Feb – 4th week	170 090 529	125 730 973	−44 359 556 (−26.1%)	2133	27
Mar – 1st week	164 855 643	123 492 052	−41 363 591 (−25.1%)	4430	117
Mar – 2nd week	154 628 156	132 054 132	−22 574 024 (−14.6%)	1319	713
Mar – 3rd week	158 348 967	136 602 840	−21 746 126 (−13.7%)	713	2611
Mar – 4th week	162 656 743	139 886 152	−22 770 591 (−14.0%)	679	4811
Mar – 5th weekc	176 503 164	137 714 570	−38 788 594 (−22.0%)	308	5567
Average	159 044 566	143 655 563	−201 776 965 (−9.7%)

Data: Public data portal, Korea Expressway Corporation point traffic data (date of access: April 1, 2020) (http://data.ex.co.kr/portal/fdwn/view?type=VDS&num=37&requestfrom=dataset#); Korea Centers for Disease Control and Prevention (KCDC), South Korea COVID-19 press release (KCDC, 2020).

^aGap = average traffic per day (2020) − average traffic per day (2019).

^b%: (average traffic per day (2020) $÷$ average traffic per day (2019)) $\times$ 100.

^cMarch 29, 2020 to March 31, 2020 (3 days).