You see a pedestrian with a white cane walk out onto the road. What must you do?

A pedestrian with a white cane or a guide dog is likely to be blind or visually impaired. You must always yield to such pedestrians. In Maine, furthermore, if a visually impaired pedestrian is in the roadway, you must stop at least 10 feet away and wait until the pedestrian is out of danger. Do not sound your horn because it might startle the pedestrian or guide dog. [Stop Lines, Seeing Well While Driving, Part IV: Operating a Motor Vehicle, State of Maine Motorist Handbook and Study Guide]