by Jaymi Heimbuch, San Francisco, California on 12.14.10
TreeHugger - Cars & Transportation (bikes)

Images via Yanko Design
Safe cycling is a huge part of transitioning to a bike-friendly world, and that means great ideas for lighting and road safety products that don't weigh down the cyclist. The Signal Lock LED bike lock/light is a perfect example of a multi-functional product that keeps both the cyclist and the bike safe. The lock turns into a glowing road hazard sign for when you're stopped on the side of the road at night.