rules, and procedures to ensure harmonious, orderly interaction.
This requires qualities of systematic thinking, which infers
methodical, logical, and purposeful procedures.
When designers have approached the problems of such systems in
terms of formal, visual solutions, carrying over approaches to less
complex tasks, these have often failed dismally to address the real
problems of adapting to new requirements. As so often in history,
new technologies tend to be defined initially in old forms and a
transition period often seems to be necessary before new forms are
evolved. Typical examples are the horseless carriage before it
developed into the automobile, or desk-top computers, basically
a television screen and a typewriter keyboard, which still await
resolution. This is certainly the case with many systems which
have tended to evolve in response to practical needs in the first
instance, and only subsequently evolved to a level where they were
considered systematically. Initially, cars existed in isolation, needing
to carry fuel for long journeys and with personal owners responsible
for repairs. Outside cities they ran largely on unmade roads.
Only later did a systematic approach to road construction and
maintenance, information systems, and support systems such as
those providing repairs, fuel, and refreshment come into being. It
took half a century for coherently planned systems of high-speed
roads, variously known as autobahns, motorways, or freeways, to
become an accepted component of motorists’ expectations.
In addition to the physical aspects of systems, information
obviously plays an important part in communicating to users.
One particular feature of road networks – road signage – illustrates
some key features of design in a systems context. Each directional
sign on a road network gives specific information in relation to the
particular geographical point at which it is located and connections
therefrom. They are not individually designed, however, but instead
conform to a standard specification determining the size of each
sign, the typeface and symbols used, and the colours in which they
are displayed. In the United Kingdom, for example, motorway signs
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Design