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<< Because most drive through ATM's are available to and used by walk up customers. >>
Ok, then why is it a "drive through" ATM if you can walk up and use it? >>
here's the deal: they want to have them on certain atms. it is cheaper to use the same machinery to make all of them, than to have a separate process for making non-braille ones. it's not like those little dots cost them tremendous amounts of money.