When is it acceptable to install an information sign on the right-hand side of a taxiway instead of the left-hand side?

It is acceptable when installation on the left-hand side is not possible due to infrastructural or operational restrictions, and a safety assessment indicates that the right-hand installation would not adversely affect the safety of operations of aeroplanes, provided the sign is in accordance with the specifications in Table N-1.

What does the safety assessment need to demonstrate for a right-hand side installation of an information sign on a taxiway?

The safety assessment must indicate that the right-hand side installation would not adversely affect the safety of operations of aeroplanes.

GM1 ADR-DSN.N.785 Information signs

Q: What conditions must be met to place information signs at a 'T' intersection in the direction of the taxiway centre line to the opposite side of the crossing taxiway?

The signs may be located there when a safety assessment indicates that guidance could be assured under all intended operating conditions and that it would not adversely affect the safety of operations of aeroplanes.

Q: For a 'T' intersection, what two specific aspects must the safety assessment confirm before placing information signs on the opposite side of the crossing taxiway?

The safety assessment must confirm that guidance could be assured under all intended operating conditions and that it would not adversely affect the safety of operations of aeroplanes.

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GM1 ADR-DSN.N.785 Information signs

ED Decision 2016/027/R

(a) When an installation of information sign on the left-hand side is not possible, e.g. due to infrastructural or operational restrictions, an installation on the right-hand side of the taxiway in accordance with the specifications given in Table N-1 may also be acceptable when a safety assessment indicates that it would not adversely affect the safety of operations of aeroplanes.

(b) At a ‘T’ intersection, information signs may be located in the direction of the taxiway centre line to the opposite side of the crossing taxiway when a safety assessment indicates that guidance could be assured under all intended operating conditions and that it would not adversely affect the safety of operations of aeroplanes.

[Issue: ADR-DSN/3]

Details

Source-Title: GM1 ADR-DSN.N.785 Information signs View latest amendments

Erulesid: ERULES-1963177438-2509 Compare versions

Domain: Aerodromes

Activitytype: Aerodrome operations, Aerodrome design, Manufacturing

Amendedby: CS Issue 3

Applicabilitydate: 15 December, 2016

Entryintoforcedate: 14 December, 2016

Icaoreference: Annex 14, Volume I

Regulatedentity: Aerodrome operator, Aerodrome design organisation, Aerodrome equipment manufacturer

Regulatorysource: ED Decision 2016/027/R Navigate

Regulatorysubject: CS-ADR-DSN

Technicalsubjectmatter: Signs

Typeofcontent: GM to CS (Guidance material to certification specification)

Parentir: CS ADR-DSN.N.785 Information signs

Easacategory: Non-instrument runway, Non-precision approach runway, Precision approach runway Category I, Precision approach runway Category II, Precision approach runway Category III, Take-off runway

Origin: EASA

Category: EAR