Don't try to share lanes with other traffic that are too narrow for safe side-by-side sharing. Riding far right in lanes less than 14 feet (4.3 m) in width is a great cause of conflict and consternation in traffic.
It makes the cyclist less conspicuous and invites motorists to try to squeeze into the lane side-by-side with the cyclist,
causing them to either pass with insufficient safety margin, or realize too late that they have to at least encroach in the adjacent lane to pass safely. Alert them early of the condition that lane sharing is not an option by clearly controlling the lane by riding near the center of the lane, or even left of center, so they have the time and space to plan a safe lane change and pass.