World Resources Institute
March 2008
The metropolitan region of Porto Alegre in the state of Rio Grande do Sul, Brazil, has seen a steep rise in motorization levels due to rapid economic growth and an increased demand for transportation. The municipality of Porto Alegre understands that the city’s transportation sector contributes to local and global emissions
and is interested in evaluating the impact of the following transportation projects:
(1) a fare integration scheme, to be implemented across all municipal bus lines in order to increase public bus ridership, and
(2) a Bus Rapid Transit (BRT) system designed to reduce the number of buses and bus terminals downtown and revitalize the city center.
This study provides a first level estimation of the impact of the two projects on CO2, CO, NOx, PM2.5 exhaust emissions levels from the metropolitan, municipal and BRT bus fleets, by multiplying the number of km with emission factors. In addition, the study assesses the potential of alternative fuels and technology options to further
reduce emissions.
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