Ever since the Earth Summit was launched at Rio de Janeiro, Brazil, in
1992, the concept of sustainability has exerted significant influence
on policy at local level. Sustainable urban development has also beco
me an important local strategy for global sustainability. Due to their
integrative and forward-looking characteristics, sustainability indic
ators have been proposed to measure and evaluate urban development. Af
ter discussing the ecological economic dimension of urban sustainabili
ty, this paper presents a procedure and a conceptual framework of the
indicator system for measuring Taipei's urban sustainability. On the b
asis of natural processes and evolving urban development, the approach
to Taipei's sustainable development is defined as reinforcing Taipei'
s metropolitan life-support system through its economic vitality for e
nhancing Taipei's urban productivity and quality and making Taipei a n
ational capital with blue-green characteristics. Based on the conceptu
al framework of urban ecological economic system, 80 indicators are se
lected through participation of non-governmental organizations (NGOs),
which can be used as policy-making indicators for measuring Taipei's
urban sustainability. The policy-making indicators are further aggrega
ted into 10 general public indicators and evaluated using signal light
s (green, yellow and red). It is concluded that the proposed indicator
system can provide evidence of progress on urban sustainability. Just
ification of public expenditure on urban development can therefore be
evaluated. (C) 1998 Elsevier Science B.V. All rights reserved.