A A  1 8  18  Runway holding position marking and lights for land and hold short operations (LAHSO)  Painted taxiway direction sign  Painted taxiway location sign  Taxiway centerline marking  Not under ATC control Under ATC  control  Taxiway edge marking (do not cross)  Centerline/lead-on lights  Stop bar at instrument landing system hold position  Broken taxiway edge markings may be crossed  Painted  holding  position sign  Low visibility hold point Vehicle lanes  Reporting points  In-pavement runway guard lights  Figure 1-4. Key airport lighting and markings.  Aeronautical Knowledge, appendix 1, as well as on the FAA’s  website at http://www.faa.gov/airports/runway_safety/.  for clarification and, if necessary, request progressive taxi  instructions. Pilots are encouraged to notify the appropriate  authorities of erroneous, misleading, or decaying signs or  lighting that would contribute to the failure of safe ground  operations.  On any given day, the NAS may handle almost 200,000  takeoffs and landings. Due to the complex nature of the  airport environment and the intricacies of the network of  people that make it operate efficiently, the FAA is constantly  Flight crews use airport lighting, markings, and signs to  help maintain situational awareness. These visual aids  provide information concerning the aircraft’s location on  the airport, the taxiway in use, and the runway entrance  being used. Overlooking this information can lead to  ground accidents that are entirely preventable. If you  encounter unfamiliar markings or lighting, contact ATC  Airport Signs, Lighting, and Markings  Runway Incursions  1-5 