Within the framework of this study, cost – benefit analyses for the completion of two Athens Metro extensions are elaborated, taking into account the economic crisis and its impact on both urban mobility and modal split.

The main objective of this study is to examine the economic viability of two extensions of the Athens Metro Network. More specifically, two cost-benefit analyses are elaborated with regards to the:

  • Metro Line 2 extension towards Elliniko. The extension will be 5.5 km long in total and includes 4 new metro stations (Ilioupoli, Alimos, Argyroupoli and Elliniko), as well as an underground area for the stabling of eight trains to serve the needs of the extension. This Line extension will provide transportation services to the wider area along one of the main road axes of Athens (Vouliagmenis Avenue), i.e. the areas of the municipalities of Aghios Dimitrios, Ilioupoli, Argyroupoli, Alimos and Elliniko.
  • Metro Line 3 extension towards Piraeus. The extension will be 6.5 km long, including 4 mew metro stations (Agia Varvara, Korydallos, Nikaia, Maniatika, Piraeus, Dimotiko Theatro).

The above cost-benefit analyses include both financial viability and socioeconomic analysis, while sensitivity and risk analyses will also be performed. Regarding passenger demand estimation, data sets extracted by the Attiko Metro demand model are used, based on which two scenarios were examined: Without Project (i.e. metro line 2 extensions) scenario and With Project (i.e. metro line 2 extensions) scenario. These data sets mainly refer to the target years 2010 and 2020 and were appropriately updated, taking into consideration the economic crisis in Greece and its impact on both urban mobility and modal split.