Lisbon and Porto metropolitan areas in context- the relevance of the car um greenhouse gas emissions, demanda and supply and in residents´ transportation costs

Transports sector is the second sector that most contributes to GHG emissions across the world, with a particular emphasis in Portugal. In a world where Car dominates demand by farandw here in dividuals, ingeneral, refer some problems in Mass transports supply, such as low frequency in peak hours and proximity to some residential areas, transportation costs (especially the ones related with the car) appear as an important urban problem. However, changes in Transports mix t squeeze the Car and that are estimated for 2030 and 2050 may have a crucial impact on GHG emissions reduction