Video - Sharing time: Tracking the ‘sharrow’ on city streets

A "sharrow" -- the word is an amalgamation of "arrow" and "share the road" -- is a larger-than-life thermoplastic symbol of a bicycle topped by two chevrons pointing the way forward. More technically known as "shared lane markings," they're intended to remind two-wheeled and four-wheeled road users alike to share with each other, and also to encourage people on bikes to take the lane when it's too narrow to ride side-by-side with car traffic. Sharrows have been increasing in popularity nationwide, and got a boost in 2009 when they were officially entered into the federal transportation engineering canon.