ISO-2575:2010 pdf free download – Road vehicles一Symbols for controls, indicators and tell-tales.
4 General
4.1 The symbols and signs shall be as given in Annexes A to N and Annex X. Additional symbols are given in Annexes W, Y and Z. Minor deviations to the symbols and signs are permitted, provided they are necessary to reproduce an accurate representation to the driver’s line of sight.
NOTE Additional annexes can be included in future editions of this International Standard if necessary.
4.2 In developing the symbols and signs shown in Annexes A to Z, legibility factors such as line thickness, gaps between lines, symbol and arrow shapes, etc. were carefully considered. Modifications that improve legibility are permitted in the circumstances specified in 4.2.1, 4.2.2 and 4.2.3. When modifying symbol elements, the graphic designer should consult IEC 80416-1, ISO 80416-2, IEC 80416-8, and ISO 80416-4.
4.2.1 Limitations inherent in some reproduction and display technologies can require increased line thickness or other minor modifications of symbols. Such modifications are acceptable provided the symbol remains unchanged in its basic graphical elements and is easily discernible by the operator.
4.2.2 Additionally, to improve the appearance and perceptibility of a graphical symbol or to coordinate with the design of the equipment to which it is applied, it can be necessary to change the line thickness or to round off the corners of the symbol. The graphic designer is normally free to make such changes provided that the essential perceptible characteristics of the symbol are maintained.
4.2.3 The graphic designer may render a symbol in either outline or solid form unless this is otherwise prohibited by the symbol description.
4.3 The vehicle shapes shown in this International Standard are not intended to be restrictive but are the recommended shapes. Modifications to a passenger car or commercial vehicle shape may be introduced by designers in order to better represent the true exterior shape of a given vehicle. Except for vehicle shape, no other symbol element shall be changed, except as provided in 4.2 or in the specific symbol’s description.
4.4 If a symbol shows a vehicle or parts of a vehicle in a side view, a vehicle moving from right to left in the symbol area shall be assumed. If a symbol shows a vehicle or parts of a vehicle in a top, plan view, a vehicle moving from bottom to top in the symbol area shall be assumed.
4.5 For actual use, all symbols shall be reproduced large enough to be easily discernible by the operator. See IEC 80416-8 for guidelines on the proper sizing of symbols. Symbols shall be used in the orientations shown in this International Standard unless otherwise noted for individual symbols.
4.6 Symbols on controls and displays shall contrast well with their background. For most controls, a light symbol on a dark background is preferred. Displays may use either a light symbol on a dark background or a dark symbol on a light background, depending on which alternative provides the best visual perception. When a symbol image is reversed (for example black to white and vice versa), it shall be done for the entire symbol.
4.7 For symbols that are displayed using pixel matrices, the character matrix shall be as stipulated in ISO 15008.
4.8 Letters and numerals may be used as symbols, but are not registered by ISO/TO 145, Graphical symbols, or published in ISO 7000. For example, the letters P, R, N, D, listed as symbols H.01 to H.04, have the meaning indicated when used in association with transmission gear controls and displays on road vehicles. The fonts shown in this International Standard are not intended to be restrictive; other fonts may be substituted provided that legibility is maintained.
4.9 “Failure” or “malfunction” may be conveyed in two ways:
a) base symbol combined with a colour code according to 5.1;
b) base symbol combined with failure symbol X.08; optionally, an appropriate colour code in accordai with 5.1 may be added.