AIM 2-1-10

Taxiway Edge Lights. Taxiway edge lights are used to outline the edges of taxiways during periods of darkness or restricted visibility conditions. These fixtures emit blue light. NOTE-

At most major airports these lights have variable intensity settings and may be adjusted at pilot request or when deemed necessary by the controller.

Taxiway Centerline Lights. Taxiway centerline lights are used to facilitate ground traffic under low visibility conditions. They are located along the taxiway centerline in a straight line on straight portions, on the centerline of curved portions, and along designated taxiing paths in portions of runways, ramp, and apron areas. Taxiway centerline lights are steady burning and emit green light.

Clearance Bar Lights. Clearance bar lights are installed at holding positions on taxiways in order to increase the conspicuity of the holding position in low visibility conditions. They may also be installed to indicate the location of an intersecting taxiway during periods of darkness. Clearance bars consist of three in-pavement steady-burning yellow lights.

Runway Guard Lights. Runway guard lights are installed at taxiway/runway intersections. They are primarily used to enhance the conspicuity of taxiway/runway intersections during low visibility conditions, but may be used in all weather conditions. Runway guard lights consist of either a pair of elevated flashing yellow lights installed on either side of the taxiway, or a row of in-pavement yellow lights installed across the entire taxiway, at the runway holding position marking. NOTE-

Some airports may have a row of three or five in-pavement yellow lights installed at taxiway/runway intersections. They should not be confused with clearance bar lights described in paragraph 2-1-10 c , Clearance Bar Lights.

Stop Bar Lights. Stop bar lights, when installed, are used to confirm the ATC clearance to enter or cross the active runway in low visibility conditions (below 1,200 ft Runway Visual Range). A stop bar consists of a row of red, unidirectional, steady-burning in-pavement lights installed across the entire taxiway at the runway holding position, and elevated steady-burning red lights on each side. A controlled stop bar is operated in conjunction with the taxiway centerline lead-on lights which extend from the stop bar toward the runway. Following the ATC clearance to proceed, the stop bar is turned off and the lead-on lights are turned on. The stop bar and lead-on lights are automatically reset by a sensor or backup timer. NOTE-

Pilots should never cross a red illuminated stop bar, even if an ATC clearance has been given to proceed onto or across the runway.

NOTE-

If after crossing a stop bar, the taxiway centerline lead-on lights inadvertently extinguish, pilots should hold their position and contact ATC for further instructions.

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Chapter 2. Aeronautical Lighting and Other Airport Visual Aids AIM

AIM by Chapter Number Chapter 0. General Information Chapter 1. Air Navigation Chapter 2. Aeronautical Lighting and Other Airport Visual Aids Chapter 3. Airspace Chapter 4. Air Traffic Control Chapter 5. Air Traffic Procedures Chapter 6. Emergency Procedures Chapter 7. Safety of Flight Chapter 8. Medical Facts for Pilots Chapter 9. Aeronautical Charts and Related Publications Chapter 10. Helicopter Operations Chapter 11. Unmanned Aircraft Systems (UAS) Appendix 1 Appendix 2 Appendix 3 Appendix 4 Appendix 5

ATPUBS

AIM by Topic

General Information Explanation of Changes

Air Navigation Navigation Aids

Performance-Based Navigation (PBN) and Area Navigation (RNAV)

Aeronautical Lighting and Other Airport Visual Aids Airport Lighting Aids

Air Navigation and Obstruction Lighting

Airport Marking Aids and Signs

Airspace General

Controlled Airspace

Class G Airspace

Special Use Airspace

Other Airspace Areas

Air Traffic Control Services Available to Pilots

Radio Communications Phraseology and Techniques

Airport Operations

ATC Clearances and Aircraft Separation

Surveillance Systems

Operational Policy/Procedures for Reduced Vertical Separation Minimum (RVSM) in the Domestic U.S., Alaska, Offshore Airspace and the San Juan FIR

Operational Policy/Procedures for the Gulf of America 50 NM Lateral Separation Initiative

Air Traffic Procedures Preflight

Departure Procedures

En Route Procedures

Arrival Procedures

Pilot/Controller Roles and Responsibilities

National Security and Interception Procedures

Emergency Procedures General

Emergency Services Available to Pilots

Distress and Urgency Procedures

Two‐way Radio Communications Failure

Aircraft Rescue and Fire Fighting Communications

Safety of Flight Meteorology

Barometric Altimeter Errors and Setting Procedures

Cold Temperature Barometric Altimeter Errors, Setting Procedures and Cold Temperature Airports (CTA)

Wake Turbulence

Bird Hazards and Flight Over National Refuges, Parks, and Forests

Potential Flight Hazards

Safety, Accident, and Hazard Reports

Medical Facts for Pilots Fitness for Flight

Aeronautical Charts and Related Publications Types of Charts Available

Helicopter Operations Helicopter IFR Operations

Special Operations

Unmanned Aircraft Systems (UAS) General

Small Unmanned Aircraft System (sUAS)

Large UAS (MGOW 55 Pounds or More)

Airspace Access for UAS

UAS Pilot Testing, Certification and Responsibilities

Advanced Air Mobility

UAS Operations on Airports

Other Information and Best Practices

Appendix 1

Appendix 2

Appendix 3

Appendix 4

Appendix 5

Aeronautical Lighting and Other Airport Visual Aids

Air Navigation and Obstruction Lighting

Chapter 2. Aeronautical Lighting and Other Airport Visual Aids

Section 2. Air Navigation and Obstruction Lighting