This paper investigates the impact of visualizing the risk of encountering potential accessibility barriers on the route planning behavior of pedestrians with mobility impairments. Using a prototype system, we explored the relationship between the risk of facing possible accessibility barriers and the navigation planning behavior of the mobility impaired users. We found that mobility impaired users had a very strong inclination towards longer but accessible barrier-free routes instead of shorter potentially inaccessible routes (being willing to travel over 900 metres to avoid barriers), suggesting a degree of risk aversion that goes beyond the literature. However, we have also observed users’ varying risk attitudes towards obstacles based on the type of impairments, mobility aids, and individual perceptions and mobility preferences. Our investigation also underscored the importance of presenting risk information, which is currently overlooked in accessible navigation systems.