I live in a big metropolitan city.
It is a big neighborhood filled with millions of people.
As you can really imagine, the neighborhood is honestly busy because of the big population. This means that traffic is typically heavy. Many people opt for public transferation to avoid street traffic. However, this causes public transferation to be packed and crammed. I usually take the train to and from work, so I run into crammed trains all the time. Other than the obvious physical discomfort from being in a slim space with so numerous people, the temperature conditions within the trains are another source of discomfort. The trains get so hot because of body heat. The aged trains don’t have any source of cool air, so those trains become unbearably hot. Nothing is worse than being pressed up against someone while covered in sweat from the high uneven temperatures. The newer trains have honestly strong cooling systems, so those trains can handle the body heat much better. I don’t usually experience too much discomfort temperature wise when I am riding in new trains. The engineers that designed the new trains clearly knew what they were doing when designing these trains. If I ever ride on an empty train, I typically notice that they are honestly cool because of these cooling units. It almost feels like I am in the luxury of my house with the a/c component blasted to full speed. I am so thankful that the neighborhood came out with these new trains and decided to invest in cooling systems within the trains. It makes the commutes so much easier.