Appendix B - Acronyms and Abbreviations

Airport Markings Type of Marking Action or Purpose Holding Position: Denotes entrance to a runway from a taxiway, approach hold position on a taxiway, or LAHSO holding position on a runway. ILS Critical Area Boundary: Denotes entrance to an area to be protected for an ILS signal. Taxiway/Taxiway Holding Position: Denotes location on taxiway or apron where aircraft hold short of another taxiway. Taxiway Edge: Solid Double Yellow Lines Defines edge of usable, full strength taxiway. Adjoining Non-Movement Area Boundary: pavement IS NOT intended for use by aircraft. Delineates movement area under control of ATC, from non-movement area. Surface Painted Holding Position: 4-22 4-22 Denotes entrance to a runway from a taxiway. Enhanced Taxiway Centerline: Provides visual cue to help identify location of a runway holding position on a taxiway. These markings are installed 150 feet prior to the holding position markings. Surface Painted Taxiway Direction: T Defines designation/direction of intersecting taxiway(s). Surface Painted Taxiway Location: B Identifies taxiway on which the aircraft is located. Figure C-3. Samples and explanations of standard airport markings. C-4 noitcerid ixaT noitcerid ixaT Type of Marking NNOONN--UUSSEEAABBLLEE Action or Purpose Type of Marking UUSSEEAABBLLEE Action or Purpose Taxiway Edge: Dashed Double Yellow Lines Defines taxiway edge where adjoining pavement IS USABLE, such as along an apron or ramp.