36" (915 mm) minimum for travel; 32" [815 mm] at a point
60" (1525 mm) minimum for passing space or U-turn
extra room where turning or maneuvering is required
ADAAG Appendix: A4.2.1(2) Space Requirements for Use of Walking Aids.
Although people who use walking aids can maneuver through clear width openings of 32
in (815 mm), they need 36 in (915 mm) for comfortable gaits. Crutch tips, often
extending down at a wide angle, are a hazard in narrow passageways where they might
not be seen by other pedestrians...
(3) Space Requirements for Passing.
Able-bodied persons in winter clothing, walking straight ahead with arms swinging, need
32 in (815 mm) of width, which includes 2 in (50 mm) on either side for sway, and
another 1 in (25 mm) tolerance on either side for clearing nearby objects or other
pedestrians. Almost all wheelchair users and those who use walking aids can manage
within this 32 in (815 mm) width for short distances. Thus, two streams of traffic can
pass in 64 in (1625 mm) in a comfortable flow. Sixty in (1525 mm) provides a minimum
width for a somewhat more restricted flow. If the clear width is less than 60 in (1525
mm), two wheelchair users will not be able to pass but will have to seek a wider place for
passing. Forty-eight inches (1220 mm) is the minimum width needed for an ambulatory
person to pass a non-ambulatory or semi-ambulatory person. Within this 48 in (1220
mm) width, the ambulatory person will have to twist to pass a wheelchair user, a person
with a service animal, or a semi-ambulatory person. There will be little leeway for
swaying or missteps.