Considering a set of locations (nodes) six networks strategies can be established to service them: Minimum construction costs network (A). Network where all locations are linked through a single route. Minimum accessibility network (B). Network where all locations are linked and have the same accessibility level. Nodal network (C). One
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Modes of Territorial Occupation by Transport Networks
Transportation networks have three main footprints:
A Typology of Transportation Networks
Many criteria can be used to classify transportation networks. Its level of abstraction can be considered with tangible network representations closely matching reality (such as a road map). Conversely, an abstract network would only symbolize the nodes and flows (such as an airline network). Since transportation networks have a geographical
Network Topology and Connectivity
Source: Adapted from William Black (2000) “An Unpopular Essay on Transportation”, Douglas Fleming lecture, Presented at the meeting of the Association of American Geographers, Pittsburgh, Pennsylvania. Several alternatives, each having a specific topology, are possible to establish a level of service through a transportation network. Each topology is reflective of
Network Geometry and Number of Links
A network is a set of nodes (locations) linked by links (arcs between locations), and a graph is the symbolic representation of a network. The following attributes characterize network geometry: For a node to be linked to another node n/2 links are necessary for an even number of nodes and
Network Topologies
A network topology is related to the arrangement of nodes and links, particularly how each node is linked with the others:
Topology of a Network
Network topology looks at the arrangement of nodes and links, particularly their locations and the nature of their connections. Network connectivity involves a specific configuration of links and nodes. Links indicate which nodes are linked and how they are linked, namely with a directional attribute such as unidirectional or bi-directional.
Major upgrade to the Geography of Transport Systems
I finally decided to move the Geography of Transport Systems to its own domain name (www.transportgeography.org) and manage its extensive contents of more than 1,500 independent pages using the WordPress Content Management System. This CMS is more flexible than the standard (and obsolete) web design platform I have been using
Continue readingCost Structure of Point-to-Point and Hub-and-Spoke Networks
Source: Adapted from Alexander Kuznetsov, Admiral Makarov State Maritime Academy, St. Petersburg, Russia. The network structure of a transport service is commonly linked with its cost structure. In a conventional point-to-point service, the total transport cost is simply a function of the transshipment and shipment costs. The above figure assumes
Transport Rates and Network Structure
The network structure can influence transport rates since it shapes the quantity of traffic transiting through links and nodes and, therefore, the potential for economies of scale along these routes. The above example represents locations with similar characteristics (e.g. population) and generating the same amount of traffic. The transport rates