This study examines human driver behavior in critical scenarios involving pedestrians to enhance our understanding of human factors in driving towards developing a credible safety baseline for automated vehicles. We examined driver-pedestrian interactions under three main scenarios: pedestrian crossing without obstruction, pedestrian crossing with obstruction but in clear sight, and pedestrian crossing with obstruction without clear sight. We compare the interactions by measuring physiological responses, driving parameters such as speed and braking position, and subjective ratings. The analysis offers initial results of the investigated scenarios, that can then be integrated into safety assessments for automated vehicles.