Between Jolarpettai and Ambur. When my seatmate realized I was intensely interested in what was outside, she switched seats with me. Her English was clear and fluid, betraying a good education, and everything about her was also comfortably middle class, at least.

On the coach, she was the only one I saw with a mask on, and she wore it the entire +5 hours. (She got on in Bangarapet.) I'm guessing the Indian schools and universities must have drilled all the Covid bullshit pretty damn hard into their students.