ED Decision 2017/021/R
(a) Applicability:
(1) A stop bar should be provided at every runway-holding position serving a runway when it is intended that the runway should be used in runway visual range conditions less than a value of 550 m, except where:
(i) appropriate aids and procedures are available to assist in preventing inadvertent incursions of traffic onto the runway; or
(ii) operational procedures exist to limit, in runway visual range conditions less than a value of 550 m, the number of:
(A) aircraft on the manoeuvring area to one at a time; and
(B) vehicles on the manoeuvring area to the essential minimum.
(2) Where there is more than one stop bar associated with a taxiway/runway intersection, only one should be illuminated at any given time.
(3) A stop bar should be provided at an intermediate holding position when it is desired to supplement markings with lights, and to provide traffic control by visual means.
(b) Location: Stop bars should be located across the taxiway at the point where it is desired that traffic stop.
(c) Characteristics:
(1) Stop bars should consist of lights spaced at uniform intervals of not more than 3 m across the taxiway, showing red in the intended direction(s) of approach to the intersection or runway-holding position.
(2) Stop bars installed at a runway-holding position should be unidirectional, and should show red in the direction of approach to the runway.
(3) The intensity in red light and beam spreads of stop bar lights should be in accordance with the specifications in CS ADR-DSN.U.940, Figures U-16 to U-20, as appropriate.
(4) Where stop bars are specified as components of an advanced surface movement guidance and control system, and where, from an operational point of view, higher intensities are required to maintain ground movements at a certain speed in very low visibilities or in bright daytime conditions, the intensity in red light and beam spreads of stop bar lights should be in accordance with the specifications in CS ADR-DSN.U.940, Figures U-21, U-22 or U-23, as appropriate.
(5) Where a wide beam fixture is required, the intensity in red light and beam spreads of stop bar lights should be in accordance with the specifications in CS ADR-DSN.U.940, Figure U-21 or Figure U-23, as appropriate.
(6) The lighting circuit should be designed so that:
(i) stop bars located across entrance taxiways are selectively switchable;
(ii) stop bars located across taxiways intended to be used only as exit taxiways are switchable selectively or in groups;
(iii) when a stop bar is illuminated, any taxiway centre line lights installed beyond the stop bar should be extinguished for a distance of at least 90 m; and
(iv) stop bars are interlocked with the taxiway centre line lights so that when the centre line lights beyond the stop bar are illuminated, the stop bar is extinguished and vice versa.
(7) Stop bar lights chromaticity should be in accordance with the specifications in CS ADR-DSN.U.930 and Figure U-1A or U-1B, as appropriate.
[Issue: ADR-DSN/3]
[Issue: ADR-DSN/4]
EASA aviation regulations mandate stop bars at runway holding positions for low visibility operations (below 550m RVR), unless alternative safety measures exist. Stop bars, consisting of red lights, must be selectively switchable and interlocked with taxiway lights. Their intensity and chromaticity must adhere to specific standards for safe ground movement.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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