1 - HKU Libraries

T.PD.M.V.2.3
(Al/2001)
3.7.7.7 Table 3.7.7.2 sets out the design dimension standards for footways and subways and takes
into account recommendations made to improve access for the disabled. For further
information as to design details the Structures Design Manual for Highways and Railways
should be referred to.
3.7.7.8 Some reduction in the widths of stairways may be appropriate where sites are physically
restricted such as at tram islands, but care must be taken that there is sufficient space for
pedestrians proceeding in opposite directions to pass one another without endangering
themselves or others. The use of "absolute" maximum height risers should be avoided in
these circumstances.
3.7.7.9 Where steps to footbridges incorporate a change in direction the minimum width of landing
as given in Table 3.7.7.2 may not be adequate and should be checked against the capacity of
the stairs. Also as far as possible a forward clear visibility of at least 3m should be
maintained.
3.7.7.10 To minimise pedestrian fears for their safety in subways where possible corners should have
a 4.6m radius in order that a minimum visibility distance of 4m is achieved. This is also
relevant if the subway is a combined pedestrian/cycle way and in these cases a greater
visibility distance is desirable, though it is accepted that the visibility distances for cycle
tracks given in paragraph 3.8.3.11 may be difficult to attain. Similarly, consideration should
be given to the design of footbridge railings or glass wall, so that pedestrians are visible
from outside.
3.7.7.11 Access for people with disabilities should be provided for all footbridges, elevated
walkways and subways either by the provision of ramps or lifts. If there is physical
limitation in providing ramps for access to these structures, the provision of an alternative,
lifts or at-grade crossing, or an alternative route, in the vicinity should be considered. To
determine whether a ramp or a lift should be provided will involve the consideration of the
following:
(i)
(ii)
(iii)
(iv)
(v)
(vi)
proximity of the facility to existing and future developments where lifts may be
provided therein;
site constraints and land use in the vicinity;
effect of ramps on adjacent properties and the environment;
the convenience/safety of pedestrians and/or other road users;
mitigating against the felling of roadside trees; and
feasibility of providing lifts.
3.7.7.12 Favourable consideration should be given to the provision of a lift if the following situations
apply:
(i)
(ii)
(iii)
a ramp cannot be provided, e.g. due to site constraint;
a reasonable alternative to crossing the road in question is not available; and
there is demand for such facility from disability organisations.