Taxiway Edge Lights
Blue lights or reflectors are used to outline the edges of taxiways during
periods of darkness or lowered visibility.
Taxiway Centerline Lights
Some taxiways have installed centerline lighting to aid in taxi during low
visibility. These lights are green in color.
Three yellow lights are sometimes installed on taxiways to increase the
visibility of a holding position or indicate the location of an intersecting
Runway Guard Lights
To point out taxiway/runway intersections, runway guard lights are installed at
some airports. They consist of a pair of elevated flashing yellow lights
installed on either side of the taxiway. Alternatively, they may be a row
of in-pavement yellow lights installed across the taxiway at the holding
Stop bars are sometimes installed to confirm air traffic control clearance to
enter or cross the active runway in low visibility conditions. The stop
bar consists of a row of red lights installed across the taxiway across the
holding position. Air traffic control turns the stop bar lights off and
the taxiway lead-on lights on with the issuance of the clearance to proceed.
In this way, the lighting systems act to confirm the clearance to proceed onto
the runway. A sensor resets the lights for the next aircraft.