Pavement Markings Road markings help direct traffic safely. Drivers should always obey lane markings, symbols, and traffic signs. Edge Lines • Solid White Line: Marks the right edge of the roadway. • Solid Yellow Line: Marks the left edge of divided highways or one-way streets. White Lane Lines (Same Direction Traffic) • Broken White Line: You may change lanes when it is safe. • Solid White Line: Lane changes are discouraged except to avoid a hazard. • Double Solid White Line