# The Rail Vehicle Accessibility (Non-Interoperable Rail System) Regulations 2010, Paragraph 4: Passenger information


(1) If horizontal or vertical scrolling displays are used—
(a) any station names (which may be abbreviated) and any other complete words or messages must be displayed for a minimum of 2 seconds; and
(b) horizontal scrolling displays must have a scrolling speed not exceeding 6 characters per second.
(2) In displays, ascenders and descenders must have a minimum size ratio of 20% to upper case characters.
(3) In this paragraph—
(a) “ascender” means that part of any of the letters b, d, f, h, i, j, k, l or t which protrudes above the height of other letters;
(b) “descender” means that part of any of the letters g, j, p, q or y which protrudes below the level of the base of other letters; and
(c) “other letters” means the letters a, c, e, m, n, o, r, s, u, v, w, x and z.

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Source: https://www.legislation.gov.uk/uksi/2010/432/schedule/1/part/2/paragraph/4 (the official version)
Page: https://openlegislation.uk/rail-vehicle-accessibility-non-interoperable-rail-system-regulations-2010/schedule-1/part-2/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.