The CDMX goes to a yellow traffic light, but when will the green light come across the country? This says López-Gatell Posted byEntrepreneur en Español May 7, 2021 Leave a comment on The CDMX goes to a yellow traffic light, but when will the green light come across the country? This says López-Gatell The Undersecretary of Health, Hugo López-Gatell clarified how and when all of Mexico is expected to go to a green traffic light, the minimum level of alert for the pandemic.