Ran in The Tennessean:
Three-light system helps the colorblind
In a letter Sept. 10, H.M. Weingartner makes an excellent case for replacing Nashville's incandescent lights with energy-efficient LED lights ("New LED lights could save money"). While I agree with his suggestion, I see a real need for keeping a three-light system.
According to a University of Washington study, more than 2.8 million people are visually handicapped from color blindness, the inability to perceive differences between some, or all, colors. I am among that statistic.
Our visual aide is the order of lights, with red on top, yellow in the middle and green at the base. I find that LED lights are far easier to distinguish, but I would rather not be another note in the afternoon traffic report.