It seems that every day there are new products to make riding our bikes more enjoyable and safer. I recently heard about a product called hammerhead which actually uses LED light array for bicycle navigation. The nice thing about this is you do not have to listen for directions on your headphones, there will be a device on your handlebars that will light in which direction you need to turn. In addition, it will also give you a visible countdown to your next turn.
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It is designed to work with an android or Apple phone. The device itself will last for 20 hours on one charge and can be charged using an USB cord. The device is not on the market yet, but a $70 pledge to put your mind to get one. For more information regarding this product please check out Dragon innovation.