Hi- This might sound silly, but how Does a Deaf person drive differently from a hearing person? How do Deaf people know if an ambulance or fire truck is coming from behind? How do Deaf people sign while driving? How about at night? I'm hearing, obviously, and I'm curious. Also, are there any devices Deaf people use to help them? I think some people use large rearview mirrors, but I don't know of anything else. I'm a design student, trying to come up with some ideas for a project. I'd appreciate your thoughts.