The City of Philadelphia is using hybrid buses to improve air quality and reduce pollution. Between 2009 and 2012, the Southeastern Pennsylvania Transportation Authority (SEPTA) purchased 440 hybrid diesel buses. For calendar years 2012 through 2015, SEPTA plans to add 285 new hybrid diesel buses.
Philadelphia began using a private car sharing service to meet the transportation needs of municipal employees in 2003. The City was one of the first in the United States to adopt such a program and reduced the number of cars owned by the City of Philadelphia by 300 vehicles in the first year of the program.
The 800 block of South Percy Street in South Philadelphia showcases the city's first porous green street. The street required excavation for a new sewer, which provided the opportunity to replace the street surface with porous asphalt. Philadelphia streets needing similar reconstruction in the future will be considered for porous application.
The City of Rio de Janeiro, with its large territorial reach and population of over 6 million people, has faced significant traffic and transportation challenges and is in the process of constructing four BRT lines to improve mobility for its citizens and in preparation for the 2016 Olympic Games.