When I lived in Mexico, I took the buses and streetcars every day.
Mexicans range from European to Mexican, and you can sort of tell by their features.
The 30¢ buses (then old converted US former school buses, populated by riders who cared about saving 20 centavos ( 1/5th of 8¢ US) were rarely as smelly as the fancier 50¢ buses. There were more standees on the cheaper buses, because that seats ran parallel to the sides of the bus, rather than in crosswise rows. Even with more arms raised on the cheaper buses you could tell the difference.
The streetcars were retired from Chicago. St Louis and Kansas City in the 1950's.
Poor Mexicans live on beans, corn, tortillas ans veggies. Richer ones eat more meat.