This work describes the construction process of an Index of Sustainable Urban Mobility
(I_SUM). Important aspects regarding its application as a mobility planning and management
supporting tool are also discussed. The index is based on a hierarchy of criteria built essentially
with data obtained from planners and technicians of eleven cities, what resulted in eighty-seven
Indicators forming thirty-seven Themes, under nine Domains. Weights for the Themes and
Domains were obtained through a panel of experts. A viability analysis of the index application
was carried out in a city with around 220,000 inhabitants located in the state of São Paulo, Brazil.
The analysis of the results has shown that a significant number of indicators could be calculated
in the short term and with good quality data in the studied city. The main conclusion drawn from
the application was the confirmation that I_SUM is flexible enough to be applied not only in a
developing country medium-sized city, but also in cities with diverse characteristics. It is
important to highlight the fact that the tool also gives the opportunity to assess the relative
contribution of any specific aspects of mobility to the Social, Economic, and Environmental
dimensions of sustainability. That I_SUM feature can be used to help in the formulation of either
integrated or stand-alone policies per sector aiming at the development of the sustainable urban
mobility. Moreover, it can help in the public participation process due to the possibility of
building up scenarios based on hypothetical changes of the indicator values
