# Transport Node overview
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The information on this page supplements that of the [Transport Node](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-technical-specification/feature-types/transport-node.md) page in the [technical specification](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-technical-specification.md). Please read the two pages in conjunction for a complete understanding of the feature type.
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A Transport Node is a point spatial object that is used to break up the Transport Network for connectivity. The Transport Network splits at the following locations:
* Where an attribute changes.
* The intersection or crossing of Transport Links.
* The start / end of a Transport Link.
Transport nodes build up the topology of the network and connect Transport Links together. They also represent Modal Change points where you can change travel modes. See the [Modal Change](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/modal-change.md) page for more information.
Transport Nodes are also present at every vertex along the network. These ‘vertex nodes’ don’t split the network; they are provided to enable software that reads in OpenStreetMap (OSM) data to build up the network vertex by vertex. The vertex nodes allow customers to convert from GeoPackage format to OSM.
The Transport Node will be attributed with a unique (but not persistent) Node ID and also the OSID of the corresponding OS parent feature that is published in the OS NGD Transport Network Collection.
Example map showing 4 different Transport Node types: Junction, Pseudonode, Road End and Modal Change
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