# Transport ## 53 Air * **0728** Airports and landing strips * **0729** Helipads ## 54 Road and Rail * **0730** Bridges * **0733** Cattle grids * **0734** Fords and level crossings * **0735** Motorway service stations * **0736** Parking * **0737** Petrol and fuel stations * **0740** Signalling facilities * **0743** Viaducts * **0744** Weighbridges ## 55 Walking * **0747** Footbridges ## 56 Water * **0751** Aqueducts * **0752** Locks * **0753** Moorings and unloading facilities * **0754** Rivers and canal organisations and infrastructure * **0755** Weirs, sluices and dams * **0760** Ferries and ferry terminals ## 57 Public Transport, Stations and Infrastructure * **0731** Bus and coach stations, depots and companies * **0738** Railway stations, junctions and halts * **0756** Tram, metro and light railway stations and stops * **0758** Taxi ranks * **0761** Underground network stations * **0794** London Underground entrances ## 59 Bus Transport * **0732** Bus stops * **0759** Hail and ride zones --- # Agent Instructions: 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: ``` GET https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-classification-scheme/transport.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.