When you’re biking, it’s important to signal the other vehicles on the road—cars and bikes alike—when you’re going to turn, change lanes, or make any other movements that may put you in harm’s way. Unfortunately, few people know hand signals anymore, so Instructables user CTY1995 decided to make hiw own wearable turn signals that he could put on his arms and turn on by lifting his arm up from his side. More »
from Lifehacker