# The Railway Safety Regulations 1999, Paragraph 1


“Railway” means a system of transport employing parallel rails which provide support and guidance for vehicles carried on flanged wheels and form a track which either is of a gauge of at least 350 millimetres or crosses a carriageway (whether or not on the same level), except that it does not include–
(a) a tramway;
(b) any part which runs along and at the same level as a street or in any other place to which the public has access (including a place to which the public has access only on making a payment);
(c) any part where the permitted speed is such as to enable the driver to stop the train in the distance he can see ahead in clear weather conditions;
(d) any part normally used other than for the carriage of fare paying passengers; or
(e) such a system if on no part of it there is a line speed exceeding 25 miles per hour.

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Source: https://www.legislation.gov.uk/uksi/1999/2244/schedule/paragraph/1 (the official version)
Page: https://openlegislation.uk/railway-safety-regulations-1999/schedule/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.