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- Tactile ground surface indicators (TGSIs)
- Heel placement location (videographic study)
- Slip resistance as measured with prototype slip tester
- Spheroidal heels
- Stairways
- Ascent trips
- Loading profile of the landing foot on stair treads
- Overstep slips
- Videographic study of stairway foot trajectories and placement
- Rough surfaces (timber boardwalks)