> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/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/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview.md). # OS MRN Overview This overview introduces the OS MRN product and gives context for all users, highlighting key features, providing examples of potential uses, and listing details such as supply formats, currency, etc. OS Multi-modal Routing Network (OS MRN) is a fully connected routable network dedicated for the multi-modal routing of people and goods. The product is designed for use in routing applications and contains multi-modal connectivity between road, rail, path and ferry networks, brought together by modal change points to enable transition between different transport modes, such as from foot to ferry or from rail to road. It offers a national view for Great Britain (i.e. England, Wales and Scotland). ## How was the product created? OS MRN was designed and built using the OpenStreetMap schema to facilitate its use in a wide range of routing applications. It takes existing OS network and routing data (available in the OS National Geographic Database – OS NGD) and maps this to the OpenStreetMap schema. New connectivity is added in the form of modal change points, which are key interchange sites where you can transition between different transport modes, such as from foot to ferry or from rail to road. Additionally, the dataset contains road restriction information and speed data. This enables simple A-to-B routing straight out of the box and more complex and optimised multi-modal routing for those with more advanced routing or software knowledge and access to third-party data. {% hint style="info" %} ## How does OS MRN differ from OS MasterMap Highways Network products? For customers interested in **routing use cases**, OS MRN is a viable alternative to [OS MasterMap Highways Network products](/os-downloads/products/transport-network-portfolio/os-mastermap-highways-network-fundamentals.md) and the [OS NGD Transport Theme](https://docs.os.uk/osngd/data-structure/transport). OS MRN is a fully connected routable network dedicated for the multi-modal routing of people and goods. The product is designed for use in routing applications and contains multi-modal connectivity between road, rail, path and ferry networks, brought together by modal change points to enable transition between modes.  For routing use cases, OS MRN offers the following advantages over OSMM Highways Network products and the OS NGD Transport Theme: * It's designed specifically for routing * There's full connectivity between different networks * It's a single dataset that incorporates routing information and speed data * It follows the OpenStreetMap (OSM) schema to enable straightforward import into routing applications, particularly open-source routing engines * The modal change points enable connectivity with key transport sites * There's easy integration with third party bus and train timetable datasets * Less processing required to use it – for example, OS has implemented the logic to determine what links are suitable for walking {% endhint %} ## Key features The key features of the OS MRN product are: * Fully connected road, rail, path and ferry networks across Great Britain * Road routing information, including turn restrictions and vehicle access restrictions * Road speed information, including maximum speed and average speed * Modal change points to represent sites where you can change transport mode * OpenStreetMap schema * OS Parent IDs containing the OS identifier (OSID) of the feature in the OS NGD ## Index This overview includes the following sections: * [Product supply](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/product-supply.md) * [Coordinate reference system](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/coordinate-reference-system.md) * [Feature types overview](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/feature-types-overview.md) * [OpenStreetMap schema](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/openstreetmap-schema.md) * [Modal change](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/modal-change.md) * [Grade separation](/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview/grade-separation.md) ### Useful resources * A helpful introductory [Lightning Talk on the OS MRN](https://docs.os.uk/more-than-maps/data-demonstrators/network-demonstrators/os-multi-modal-routing-network/os-multi-modal-routing-network) and an [OS MRN Story Map](https://storymaps.arcgis.com/stories/f00b951bf1134e0c9c35e3e51433d0cb) are available on our ['More than Maps' site](https://docs.os.uk/more-than-maps) (a self-serve site that provides a one-stop shop for all your OS technical geospatial support, including tutorials and demonstrators). --- # 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 by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.os.uk/os-downloads/products/transport-network-portfolio/os-multi-modal-routing-network/os-mrn-overview.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. 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.