- Leading Lisbon against carbon emissions    666 kb by    Carvalho, Maria & Domingues, Nuno & Sebastião, Afonso, Lucas, Jorge | carvalho.msusana@gmail.com    Short Outline The paper studies three scenarios of sharing passenger transportation modes in Lisbon. GHG emissions are studied, assuming values for decreasing the share of individual transportation and technological improvement applying EURO 5 into car fleets. Abstract The current paper focuses on the commuting flows in the Great Lisbon Area, the costs of each transportation mode, both individual and public, and the correspondent energy consumption and CO2 equivalent emissions. The analysis focused on the public transportation modes (bus, rail and waterborne) and the commuting flows on 26 corridors to/ from inner Lisbon city, linking to residential areas in the suburbs. For each transportation mode ,a Life Cycle Assessment was elaborated, considering the investments on infrastructure, the maintenance costs as well as the fixed and the variable operating costs, taking into account the number of users. The improvement of the current Great Lisbon Area status, in what regards energy and environmental, can only be achieved by diminishing the number of private vehicles commuting daily. This reduction will have an impact on the energy and environmental city profile and will also foster a better quality of life among citizens by allowing the conversion of current parking lots into public green areas. The reduction of commuting private vehicles can only be achieved by an educational campaign, motivating people to use public transportation means instead of private cars, or in a half-way solution, by actively practicing car sharing. Such a change in behaviour has to be a medium to long term target. The introduction of an inbound circulation tax for private cars can be seen as another way to enforce the use public transportation. This paper went deeper on two scenarios, the first considering a 15% migration of people from private to public transportation and the second scenario considering 40%. This shift in urban mobility paradigm would conduct to a reduction of 11%, or 29% respectively, on the total volume of CO2 eq. emissions, corresponding, for the best case scenario to a reduction of 0,2 Mton of CO2 eq./year. This reduction covers about 5% of the final Portuguese carbon deficit (2.88 Mton CO2eq./year). Keywords Urban Mobility, Passenger transportation, Energy in Transports, Energy efficiency, Carbon Emissions, Road transportation, Bus/Coach transportation, Waterborne transportation, Urban circulation tax, Life Cycle Assessment, Urban transportation modes shift. Case Study presented on the ISOCARP Congress 2009: Low Carbon Cities   Click to open the full paper as pdf document   Click to send an email to the author(s) of this paper