The article discusses the end of the spring vacation period, as millions of motorists head back to their daily activities in Mexico City (CDMX) and the State of Mexico (Edomex). With this return, the 'Hoy No Circula' program will be in effect, which restricts vehicle circulation to reduce air pollution. This program operates in the 16 boroughs of Mexico City and 18 municipalities in the State of Mexico, with certain vehicles banned from circulating between the hours of 5:00 AM and 10:00 PM.

The 'Hoy No Circula' measures are part of broader environmental policies aimed at improving air quality in the Valley of Mexico metropolitan area. This Tuesday, specific vehicles with certain stickers, particularly those with a pink emblem, are required to remain off the roads to assist in the effort to decrease atmospheric contaminants. Such restrictions are pivotal in the ongoing battle against vehicle emissions.

Overall, the enforcement of this measure highlights the continued focus on environmental health in urban areas and the importance of community adherence to these initiatives to achieve cleaner air in bustling metropolitan settings like Mexico City. With these regulations, authorities aim to not only mitigate pollution levels but also raise public awareness surrounding the environmental impact of transportation.