You need to be as safe as possible when riding on those busy streets on your bicycle. Motorists sometimes have a difficult time seeing you, especially if you have dark clothing on, and the sun has gone down. Here is a nice little gadget that signals with a light when you are ready to turn. The great thing about it is that it works automatically. It starts to blink by detecting the position of your arm. No switches to worry about, you just need to concentrate on your riding!

via safeturn