Ah, then how about a phone handset that can take outdoor abuse posted next to the keosk? USe mobile services so a phone line doesn't complicate the installation or VOIP over WiFi. As you know blind people like myself just can't use touch screen technology. The only other, and much more expensive option is to use text to speech or pre-recorded prompts and a keypad or regions on the touch screen. This would be much more expensive, as the added audio technology per keosk is expensive. The ATM model may also work, but again, expensive. The ATM model is where you still have your keypad, but upon insertion of headphones into an industrial strength audio jack, the screen goes blank and the user uses audio for guidence. Multiple language support is possible, even complicated speaking languages.
The nice part about VOIP is that identification of the device being used can be associated with the keosk. A card could therefore still be swiped for authentication. I know I'm getting technical, but if anyone else has any ideas please post them. Many elderly people with bad vision visit WDW, and rely on Disney Transportation. Touch screen technology just won't work for this group. But you are right, cell would only be useful for a blind user. The issue is, finding the keyosk in the first place. A blind person carrying a cellular phone just needs to be in the general bus stop area. If nobody is around to ask, finding the keyosk could be difficult unless it emits some sort of unique audio. Also, most blind travelers will carry a cellular phone today. Those who don't just put themselves in bad situations if they get lost. I know that I've pulled my phone out on many occasions when I'm not sure which door on a street matches the exact address of the person I'm meeting. I'll ask them to tell me some identifying factors or to simply come out and see if I'm nearby. Once I've identified a door or location once, I'm in great shape for future returns.
Ryan