52 votes
Accepted

Why are taxiway and runway centerline lights off center?

The painted line and the lights do not align for a very practical reason: it would be a major pain in the behind to paint over the lights, as each one of them would need to be masked for the painting, ...
  • 23.4k
35 votes
Accepted

How can pilots differentiate runways and taxiways during landing?

During daytime and good visibility, it should be pretty obvious that runway markings are white and taxiway markings are yellow. Runways have the runway designator in big white numbers at the end and a ...
34 votes

Do any airports have runways or taxiways that cross active rail lines at grade?

There is at least one: In Gisborne, New Zealand, there is a freight rail line which crosses the south end of runway 14/32 at Gisborne Airport (GIS). It appears to still be an active line for freight (...
  • 1,437
19 votes

Has there been any attempt to use an underground cable system, a la a cable car, to tow aircraft along taxiways?

Way to go on thinking outside of the box. Actually, it might work. Although the logistics of it are above my pay-grade. Maybe, some smart group out there could make it work. But, your question doesn’t ...
  • 16.3k
17 votes
Accepted

What does the sign "Caution your blast" mean?

I'm fairly sure that sign is beside taxiway C*, and as you can see from the aerodrome chart it is right next to the main apron. Aircraft holding in this position have the main apron directly behind ...
  • 27k
14 votes
Accepted

Do any airports have runways or taxiways that cross active rail lines at grade?

There is another place too, Manakara East Madagascar. Both train and airport are still active.
12 votes

Do any airports have runways or taxiways that cross active rail lines at grade?

There’s at least another one (not an active crossing anymore though): Wynyard Airport, on Tasmania's north-western coast, was quite unusual in that it was one of the few airports in the world to ...
  • 4,542
12 votes
Accepted

Are there any ICAO restrictions on naming a taxiway?

Per the Runway Safety HANDBOOK, First Edition 2014: 2.4 Taxiway Naming Convention A simple and logical method for designating the taxiways should be developed. The following general guidelines should ...
  • 10.9k
11 votes
Accepted

How does ATC direct aircraft on ground from the parking to the runway?

Yes, it's the same. An airport consists of one or several runways, one or several parking areas (aprons) and a number of taxiways connecting them. All runways and taxiways are uniquely named. When ...
11 votes

Has there been any attempt to use an underground cable system, a la a cable car, to tow aircraft along taxiways?

Practically this would not work due to the sheer size of the cable you would need. A fully loaded A380 is 1.25 million pounds. A B787 is .5 million pounds and a B737 is about 150,000 pounds. On a busy ...
  • 50.9k
10 votes

Do any airports have runways or taxiways that cross active rail lines at grade?

Their is a lightly used freight line crossing the runway at Filton airport, Bristol, UK. Not sure if Filton is still in use as Airbus industries no longer fly their Beluga Airbus from there. As a ...
7 votes

What is the area between the taxiway and runway shown in the picture below?

Additional information on the airport would have been nice, but from the markings it looks like it simply is a pad where two aircraft can be positioned at once. This can be useful where you have a ...
  • 3,875
6 votes

Has there been any attempt to use an underground cable system, a la a cable car, to tow aircraft along taxiways?

Cable cars, trains, and ski lifts essentially live their lives on the track or line. The repositioning and shuffling that must happen on an airport, especially pulling into and out of arrival/...
  • 4,779
6 votes

What is the area between the taxiway and runway shown in the picture below?

I suppose it is a turning area for making a U-turn after a backtrack. You can see traces from such turns on ground
  • 173
5 votes
Accepted

Why are tugs the least priority when talking to ground?

1) The video you are specifically referencing is JFK (as you probably know). JFK has a very complex airport layout and generally is very busy. There are a variety of reasons "tugs are last priority." ...
5 votes

Is it allowed to exit the runway by opposites High Speed Taxiway?

It's not really a regulation question, at least not in the way you think. There's 2 possibilities: A controlled airfield: in an airfield which has air traffic control all movements require a ...
  • 50.9k
5 votes

How does ATC direct aircraft on ground from the parking to the runway?

What happens in the flight deck at an airport with a complex taxiway system (like NY JFK, which has many multiple parallel taxiways and numerous wrong-turn traps) is the pilot taking the clearance ...
  • 111k
4 votes
Accepted

What is the best way to move a touring motor glider over a wet grass surface?

I'm guessing that as a motorglider the Falke has very small tires, 5.00 x 5 or even smaller. The "on-board" fix would be to install much larger tires to increase the contact patch area, but ...
  • 111k
4 votes
Accepted

Why were taxiways marked with numbers (as opposed to letters) back in the day?

This memorandum on taxi way nomenclature states Numbers by themselves, and the letters "I" and "O" must not be used because they could be mistaken for a runway number. The letter ...
  • 96.9k
3 votes

How does ATC direct aircraft on ground from the parking to the runway?

Taxi schemes vary with the airport, and also with the prevailing conditions. Some airports may issue a taxi clearance to a runway with intervening taxiways, while others may issue a taxi clearance to ...
  • 1,077
3 votes
Accepted

What does "1%" mean in ICAO Annex 14 § 3.9.9 (longitudinal slope changes)?

You are referring to ICAO Annex 14 Volume I, Aerodrome Design and Operations. Section 3.9.9 says: Recommendation.— Where slope changes on a taxiway cannot be avoided, the transition from one slope ...
  • 23.4k
3 votes

What is the area between the taxiway and runway shown in the picture below?

If this is a military airfield it is the arming area where ground crews do final arming of ordnance on the aircraft before it takes off. The extra space also allows more room for marshalling multiple ...
  • 19.3k
3 votes

Airplanes Parking On Taxiway

If it's an airport with a Control Tower, access to the taxiway is controlled by ATC. If it is an airport without a control tower, then concerns about aircraft parking on a taxiway would probably best ...
  • 22.4k
2 votes
Accepted

Can anyone explain what are the apron taxiway and aircraft holding taxiway with an illustration, please?

Apron taxiways are just taxiways, except they are on the apron. They help planes on the apron connect to the main taxiways or the planes on the main taxiways connect to the apron. I don't know what ...
2 votes

How can pilots differentiate runways and taxiways during landing?

ExpediteDescent has done an excellent job of describing how pilots distinguish runways and taxiways. In addition to what he has posted, I would like to add that it boils down to situational awareness ...
  • 16.3k
2 votes

Are there any airports with multi-level taxiways?

If you allow taxiway to also mean a surface where an airplane rolls but not under its own power, then there's the lower decks of an aircraft carrier, and Schätz's carousel hangars. Note that even ...
2 votes
Accepted

Does lack of a curved taxi-line indicate a turn is not permitted?

No, lack of a centerline stripe doesn't restrict a controller from assigning that routing, nor does it restrict a pilot from turning there. The stripe might be omitted because "that" turn ...
  • 43.2k
2 votes
Accepted

Has there been any attempt to use an underground cable system, a la a cable car, to tow aircraft along taxiways?

As many answers point out, one large problem is the cable itself, and how much of it you'd need to pull around to let different planes move in different ways as needed. (And how big/heavy it would ...

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