On a portion of my commute, there is a multilane road with very heavy and fast traffic with a nice 8ft wide sidewalk on only one side provided for all pedestrians and cyclers. I like using it but it gets annoying when I get behind someone or a couple walking and say "behind you" or "passing on your left" and they don't hear me with all the traffic noise. I sometimes raise my voice and it startles them. I would use the road, but authorities will not advise it because of the safer provision provided. Do you have any similar situations and how do you handle it?