AIM 

4/20/23 

row of red, unidirectional, steady

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burning in

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pavement lights installed across the entire taxiway at the runway 

holding position, and elevated steady

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burning red lights on each side. A controlled stop bar is operated in 

conjunction with the taxiway centerline lead

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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

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on lights are turned on. The stop 

bar and lead

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on lights are automatically reset by a sensor or backup timer. 

CAUTION

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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

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If after crossing a stop bar, the taxiway centerline lead

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on lights inadvertently extinguish, pilots should hold their position 

and contact ATC for further instructions. 

2

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1

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14 

Airport Lighting Aids