This paper compares users' accommodation-based pedestrian level-of service (LOS) ratings of signalized intersections in a video simulation environment and the physical roadway environment. Video simulation and walking course responses were compared with the use of data obtained from Walk for Science 2004, in which the participants reported their perceived level of safety and comfort as pedestrians. These data were used to test the hypothesis that subjects rate intersections' LOSs differently in a controlled (video simulation) environment than they do by walking along a real-world course and experiencing real-time traffic conditions. The results for intersections common to both experiences (549 observations) indicated a statistically significant difference in the respective ratings (t=2.34). Accordingly, a calibration factor was developed to adjust the participants' scores from the video event to what they would have scored in the real-time field event. The adjusted video simulation data were then used to ...