The only reason this should be added
Are for those with medical visual disabilities or flat-out blind.
For the rest (texters, mp3 listeners, etc)... Sorry, but I have two words for them. PAY ATTENTION!
As an ages old bicycler, you learn to pay attention to all the vehicles around you. Same as a rollerblader, and same as a skateboarder. YOU are far more fragile than a car, so you pay attention to what is around you and could hit you like a pinball bumper. Joggers, motorcyclists, etc, all tend to be more aware. The latter in more trouble because too many drivers act like the people are in cars, the cycle being a vehicle in it's own right. And not being relegated to the side of the road (on highways), they are harder to people to notice as 'that's their lane'.
