Table 1.

Tasks performed by blind people in an indoor environment.

S. No	Navigational Task	Risky Task	Task Description
1	Walk Forward	Upward ramp	Fall
2	Walk Backward	Downward ramp	Fall
3	Turn Left	Upward Elevator	Fall
4	Turn Right	Downward Elevator	Fall
5	Turn Around	Elevator Door	Fall
6	Hold this Side	Upward Escalator	Fall
7	Forward	Downward Escalator	Fall
8	Enter	Upward Stairs	Fall
9	Exit	Downward Stairs	Fall
10	Stop	Rout Deviation	Fall
11	Enter	In contact with sharp things (e.g., blades, scissors, knife, and glass)	Cut
12	Exit	Fire Safety Risk	Burn causing
13	Stop	Hot water	Burn causing
14	Corridors	Hot iron	Burn causing
15	Door (sliding or push)	Obstacles in front	Collision
16	Destination	Slippery/wet floor	Fall
17	Landmarks	Smooth tiles	Fall
18	Floor #	Fast Moving object	Hit