Using simulated environments and interactive technologies in Universal Design research (a) WinterLab (one of the Challenging Environment Assessment Labs) on the motion base to create different terrains. (b) WinterLab on the Single Axis Base to create slopes. (c) A participant walking inside WinterLab. Based on our survey study , we found that the key elements decreasing winter accessibility were icy sidewalks and puddles at street crossings and curb ramps. The Americans with Disabilities Act Accessibility Guidelines (ADAAG) allow a maximum run of 9 m (30 ft) for slopes between 1:12 and 1:16. Our study  demonstrated that ice covered slopes with a grade of 1:12 were not acceptable for long ramps (>=4 m) even among able-bodied older adults. (d) A multisensory interactive touch model installed at the Overbrook School for the Blind that aids in wayfinding .