> For the complete documentation index, see [llms.txt](https://docs.os.uk/osngd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd.md). # Transport networks in the OS NGD ## How is transport represented in the OS NGD? OS represents transport in two different ways in the OS National Geographic Database (OS NGD): * **Transport features**: Topographic polygons and lines representing the physical transport environment. These features represent the real-world transport infrastructure, for example, road carriageways, railways and pathways. Further detailed information and technical specifications can be found on the [OS Transport Features Collection page](/osngd/data-structure/transport/transport-features.md). * **Transport network and routing and asset management information**: Fictitious networks representing the road, path, ferry and rail networks and how you can move along them, between them, the rules governing this movement and information about their management. Further detailed information and technical specifications can be found on the [OS Transport Network](/osngd/data-structure/transport/transport-network.md) and [OS Routing and Asset Management Information (RAMI)](/osngd/data-structure/transport/rami.md) Collection pages. The following pages will mainly concern feature types in the OS Transport Network and OS RAMI Collections. The OS Transport Network Collection consists of several different but connected topologically structured link and node networks representing roads, paths, ferries and rail. Roads and paths have additional routing and asset management information associated with them, which is covered by the OS RAMI Collection. The feature types in the OS Transport Features Collection are covered in the final page: [Transport features](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/transport-features.md). The [Building routable transport networks page](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/building-routable-transport-networks.md) lists the core and optional OS NGD feature types you'll need to use to build various routable transport networks (path and road, road only, path only, ferry, and rail). ## Index: * [Building routable transport networks](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/building-routable-transport-networks.md) * [Road network](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/road-network.md) * [Routing information](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/routing-information.md) * [Streets and asset management information](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/streets-and-asset-management-information.md) * [Other road network information](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/other-road-network-information.md) * [National street gazetteers, GeoPlace and Improvement Service](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/national-street-gazetteers-geoplace-and-improvement-service.md) * [Path network](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/path-network.md) * [Ferry network](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/ferry-network.md) * [Rail network](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/rail-network.md) * [Transport features](/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd/transport-features.md) {% hint style="info" %} ### OS Multi-modal Routing Network product also available and useful for multi-modal routing of people and goods The OS Multi-modal Routing Network (OS MRN) product combines OS Road, Rail, Path and Ferry Network data into a single routable network 'out of the box', designed in Open Street Map schema to facilitate easy integration with routing applications. For more information, please view the [OS Multi-modal Routing Network documentation](https://docs.os.uk/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network#use-cases). {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-transport/transport-networks-in-the-os-ngd.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.