I commute by bicycle. Cars are generally something I don't have to worry about because my commute is mainly not on roads and where it is there are generous bike lanes (although I have been almost hit by cars, deliberately, before). The non-road portions of my commute are on paths that are marked at regular intervals with words and symbols noting that the paths are shared between pedestrians and cyclists.

Every "close encounter" with a pedestrian I've ever had has been because the pedestrian, usually with his face buried deeply into his phone, starts swerving to the side or, worse, abruptly turns. Responsibility is on all parties in spaces where there is shared traffic, not just cyclists or cars or pedestrians.