  This article attempts to highlight the importance that transportation has in
the economic development of Greece and in particular the importance of the
transportation infrastructure and transportation networks, which suggest a
fixed structured capital covering the total of the country. For this purpose,
longitudinal and cross-sectoral statistical data are examined over a set of
fundamental macroeconomic measures and metrics. Furthermore, the study attempts
to highlight the structural and functional aspects composing the concept of
transportation networks and to highlight the necessity of their joint
consideration on the relevant research. The transportation networks that are
examined in this paper are the Greek road (GRN), rail (GRAN), maritime (GMN)
and air transport network (GAN), which are studied both in terms of their
geometry and technical characteristics, as well as of their historical, traffic
and political framework. For the empirical assessment of the transportation
networks importance in Greece an econometric model is constructed, expressing
the welfare level of the Greek regions as a multivariate function of their
transportation infrastructure and of their socioeconomic environment. The
further purpose of the article is to highlight, macroscopically, all the
aspects related the study of transportation infrastructure and networks.
