Running on the White Line: One Good Earbud Review

I often use headphones when I run on the treadmill, but never when I run outside. I consider it to be a safety hazard, since 'phones prevent me from hearing traffic. Here's an interesting solution to the safety problem: just use one ear, not both. Kyle at Running on the White Line reviews:

Running on the White Line: One Good Earbud Review and Giveaway!: Something I have struggled with throughout all of my miles as an endurance athlete; to wear earbuds or not? Many larger running races and ne...