There is a hierarchy in the spatial organization of transportation at the local, regional, and global levels, mainly through its nodes, links, and relations. While gateways, supported by port, airport, and telecommunication activities, are the major nodes impacting spatial organization at the global level at the local level, the main nodes are employment and commercial activities, which tend to cluster. These scales are also characterized by specific links and relations ranging from local commuting to global trade flows and supply chains.