![]() Intermediate Taxi-Holding Position (ITHP) markings may be found at airports where the taxiway layout is complex or involves many intersecting taxiways.There is no guarantee of any clearance behind a holding aircraft. All RTHP should be located so that there is safe clearance between any aircraft holding there and any aircraft passing in front of the holding aircraft, subject to it being correctly positioned with no part of the aircraft on or beyond the line. Where there is more than one RTHP, all the additional ones will be of the second type. ![]() If only one type is present, it will always be the former. A “ladder” mark laid across the full width of the taxiway and normally at right angles to its centerline.Two solid and two broken lines across the full width of the taxiway normally at right angles to its centerline with the broken lines closest to the runway.This zone will also, where applicable, allow for the protection of the ILS Sensitive Area. Runway Taxi-Holding Position (RTHP) markings occur on each taxiway leading to a runway in order to prevent taxiing aircraft and vehicles penetrating the designated protection zone either side of a runway, which needs to be kept clear during runway use.At any runway-taxiway intersections where the taxiway centreline is curved onto the nearside of the runway centreline, pilots should take into account any loss of Runway Declared Distances incurred in following this ‘lead-on’ line when lining up for take-off. Taxiway centrelines should be located so that there is safe clearance between the largest aircraft that is permitted to use the taxiway and fixed objects or protected zones that the extremities of an aircraft on the taxiway centreline could impact, such as buildings and aircraft stands. Where a taxiway crosses a runway, the Taxiway Centreline Marking indicates the route to be followed but the marking is interrupted as necessary so as not to interfere with the runway markings. Centreline marking consists of a single continuous line marking the centre of the taxiway.Taxiway Surface MarkingsĪll painted makings on the pavement surface are coloured yellow. Local exceptions, in the form of additions to the standard designation system, may be found as, for example, with the use of ‘Inner’ and ‘Outer’ and at large airports, principal taxiways may be split into zones or ‘blocks’ and numbered uniquely. At large airports where there are more taxiways than letters of the alphabet, double letter designators may be used for minor taxiways or taxiway stubs. The letters 'O', 'I' and 'X' are not used. Standard taxiway designation is by use of single letters of the alphabet for each discrete taxiway as, for example 'A' for taxiway Alpha, 'B' for Bravo etc. The essential principles of both surface markings and signs used at licensed civil airports, with surfaced taxiways and served by public transport flights, can be expected to be in accordance with ICAO Standards and Recommended Practices (SARPS) unless an entry to the contrary appears in the State AIPs AGA section.
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