BAD NEWS SHARROWS some infrastructure worse than none

From a study out of University of Colorado sharrows may actually do more harm for bicycle riders than good.

Some Bike Infrastructure Is Worse Than None at All

But far from giving cyclists a safer ride, or even doing nothing at all, sharrows might actually be doing some harm by tugging bikes into moving traffic. Some research has found they do reduce dooring (when the door of a parked car hits a cyclist). But only one study to date looked at whether or not sharrows had any impact on overall car-bike collisions—and that study found they could be increasing the risk of injury.