GM1 ADR-DSN.L.605 Mandatory instruction marking
ED Decision 2017/021/R
(a) Except where operationally required, a mandatory instruction marking should not be located on a runway.
(b) The mandatory instruction markings and information markings on pavements are formed as if shadowed (i.e. stretched) from the characters of an equivalent elevated sign by a factor of 2.5, as illustrated in Figure GM-L-3. The shadowing only affects the vertical dimension.
Figure GM-L-3. Illustration of pavement marking spacing calculation
(c) The following example illustrates how the pavement marking spacing is to be calculated:
(1) in the case of runway designator ‘10’, which is to have a height of 4 000 mm (Hps), the equivalent elevated sign character height is 4 000/2.5 = 1 600 mm (Hes);
(2) Table N-3(b) indicates numeral to numeral code 1 and from Table N-3(c) this code has a dimension of 96 mm, for a character height of 400 mm;
(3) the pavement marking spacing for ‘10’ is then (1 600/400) x 96 = 384 mm.
[Issue: ADR-DSN/4]