🆕Transport Link overview
Note
The information on this page supplements that of the Transport Link page in the technical specification. Please read the two pages in conjunction for a complete understanding of the feature type.
A Transport Link is a linear spatial object that defines the geometry and connectivity of a road, path, rail, or ferry network between two points in the network. Transport Links are split for connectivity purposes (for example, at junctions) and Transport Nodes connect the Transport Links together. Each Transport Link provides a reference to the Transport Nodes at the start and end of the Transport Link.
Transport Links contain information about the type of link (for example, highway='motorway') and information about the access restrictions for vehicles to indicate which modes can travel along the link (e.g motor_vehicle=’yes’). There is also a maximum speed attribute, and two average speed attributes:
a conditional delimited list of all the speeds at different time periods
a single average speed using the Mon-Fri 12-2pm period.
Transport Links also incorporate Modal Change links which are a linear spatial object representing a logical connection between the transport network and a transport site. See the Modal Change page for more information.
The Transport Link is attributed with a unique (but not persistent) WayID, which routing software uses to build out the network. Transport Links are also attributed with the OSID of the corresponding OS parent feature that is published in the OS NGD Transport Theme.
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