A group of Maryland legislators aren’t just trying to encourage cyclists to use helmets, but rather are hoping to require it.

An incident last weekend in Arlington should remind bikers that shielding their noggins should be a constant habit, not a sometimes thing.

Leaders and legislators at cities around the world tackle their problems in many different ways, and there’s always space for D.C. to learn (or not). Should D.C. follow Boston’s lead in publicly promoting helmet use?