Oh, great. We've finally made a way to lower the noise from cars, so let's make it a requirement for them to make noise. I couldn't find in that link exactly

Oh, great. We've finally made a way to lower the noise from cars, so let's make it a requirement for them to make noise. I couldn't find in that link exactly how loud they want the beeps to be. What about deaf people? Shouldn't the cars be made to have flashing lights as well?