Highway strip

A highway strip, road runway or road base is a section of a highway, motorway or other form of public road that is specially built to act as a runway for (mostly) military aircraft and to serve as an auxiliary military air base. These runways allow military aircraft to continue operating even if their regular air bases, some of the most vulnerable targets in any war, are degraded or destroyed.

A C-130 Hercules lands on the A29 Autobahn near Ahlhorn during military exercise 'Highway 84'
Highway strip on Autobahn A29 near Ahlhorn

The first highway strips were constructed near the end of World War II in Nazi Germany, where the well developed Reichsautobahn system allowed aircraft to use the motorways. During the Cold War highway strips were systematically built on both sides of the Iron Curtain, in many cases in response to The Six Day War and Operation Focus in 1967, where the Israeli Air Force in a surprise air strike disabled many of their opponents' air bases in just a few hours.[1][2] Countries that have built highway strips include both West and East Germany, Singapore, North Korea, Taiwan, Sweden, Finland, Bulgaria, Switzerland,[3] Poland, India, Pakistan and Czechoslovakia.

Design

The strips are usually 2-to-3.5-kilometre-long (1.2 to 2.2 mi) straight sections of the highway, where any central reservation is made of crash barriers that can be removed quickly (in order to allow airplanes to use the whole width of the road), and other features of an airbase (taxiways, airport ramps) can be built. The road will need a thicker-than-normal surface and a solid concrete base. The specialized equipment of a typical airfield are stored somewhere nearby and only carried there when airfield operations start. The highway strips can be converted from motorways to airbases typically within 24 to 48 hours. The road would need to be swept to remove all debris before any aircraft movement could take place. Road runways can however also be quite small—the short runways built in the Swedish Bas 90 system are commonly only 800 metres (2,600 ft) in length. The STOL-capability of the Viggen and Gripen allowed for such short runways.[4][5] In the case of Finnish road airbases, the space needed for landing aircraft is reduced by means of a wire, similar to the CATOBAR system used on some aircraft carriers.[6]

Around the world
A sign on the Eyre Highway in Australia indicating that an RFDS emergency airstrip is ahead. There are four such strips on the highway.

A number of countries around the world utilise the strategy of highways constructed to double as auxiliary airbases in the event of war.

Australia

While not designed for military use, in rural Australia several sections of highway are maintained as potential runways for use by the Royal Flying Doctor Service of Australia.[7][8]

China

In 1989 China conducted its first highway strip drills. They have since been conducted at later dates and in different areas of the country.[9] In 2014 Chinese forces landed warplanes on a highway strip in Henan province for the first time.[10]

Cyprus

After the Turkish invasion of Cyprus, three highway strips were built in the Greek part of Cyprus, easily recognisable by a runway centre line and markings for the touchdown zone. They also all have aircraft turning areas at either end. One is located on the Limassol–Nicosia Highway (5,200 m or 17,100 ft) and one of the Limassol–Larnaca highway (5,000 m or 16,000 ft).[11] The third is a much smaller strip located on the Limassol-Paphos Highway near to Paphos International Airport.[12]

Estonia

During the Operation Saber Strike exercises in 2016 and 2018, A-10 Thunderbolt II aircraft from the US Air National Guard operated from former Warsaw Pact road runways in Estonia.[13][14]

Finland
Alavus road runway in Finland.

In the Winter War of 1939-1940 the Finnish Air Force re-deployed its aircraft to makeshift airfields including frozen lakes to preserve them against Soviet air attack. The tactic was successful, with Soviet air raids on bases causing little damage and the vastly outnumbered Finnish aircraft scoring a high number of aerial victories.[15]

Throughout the Cold War the Finnish Air Force maintained a network of secondary airfields including civilian airports and road bases to improve survivability and effectiveness in the event of war.[16]

As of 2017, all aircraft in the Finnish Air Force are capable of operating from road bases.[17]

Currently Finland conducts drills on its road bases (maantietukikohta), around once a year. In the Baana 16 exercise in 2016 the Finnish Air Force flew F/A-18C and BAE Hawk, Pilatus PC-12 and C295M aircraft from a highway in Lusi. The Finnish Air Force uses arresting cables to quickly stop F/A-18s, which were originally designed to operate from aircraft carriers. The Swedish Air Force also took part in the 2015 and 2016 exercises, flying Gripen fighters.[17][18]

Germany
German Reichsautobahn strip in World War II (spring 1945), with Ju 88 heavy fighters parked on the shoulders.

Germany has a number of highway strips (NLP-Str - Notlandeplätze auf Straßen, "emergency airfields on roads").

India

India has successfully tested its runway strip on a stretch of the Yamuna Expressway in Uttar Pradesh on 21 May 2015.[19] It was built at a cost of ₹13,000 Cr for its combat jets of the IAF, a first for military aviation in the country. In June 2016, the Minister for Road Transport and Highways, Nitin Gadkari announced that the government was considering developing 'Road Runways' for commercial operations as well.[20] India successfully tested another runway strip on a stretch of the Agra Lucknow Expressway in Uttar Pradesh on 24 October 2017.[21]

Japan

In Hokkaido Prefecture the Japan Self-Defense Forces have Kenebetsu Air Base and Yakumo Sub Base as alternative air bases.

North Korea
Main article: List of highway strips in North Korea

North Korea has established a large number of highway strips to use in case of war.

Pakistan
Road runway section on Pakistan's M-1 Motorway with removable medians.

In Pakistan, The M-1 Motorway (Peshawar-Islamabad) and the M-2 Motorway (Islamabad-Lahore) each include two emergency runway sections of 2,700 m (9,000 ft) length each. The four emergency runway sections become operational by removing removable concrete medians using forklifts. The Pakistan Air Force (PAF) has used the M2 motorway as a runway on two occasions: for the first time in 2000 when it landed an F-7P fighter, a Super Mushak trainer and a C-130 and, again, in 2010. On the last occasion, the PAF used a runway section on the M2 motorway on 2 April 2010 to land, refuel and take-off two jet fighters, a Mirage III and an F-7P, during its Highmark 2010 exercise.In March 2019,Pakistan also used a section of M2 motorway to land its fighter jets to demonstrate its capability. [22]

Poland

A large number of highway strips (DOL - Drogowy Odcinek Lotniskowy, lit "road airfield section") were built during the Cold War in Poland. As of 2003, only one highway strip is used annually for an exercise.[23]

Singapore

The Republic of Singapore Air Force periodically conducts an "alternate runway exercise". It was first conducted on 17 April 1986 with F-5 and A-4 aircraft.[24] The seventh exercise, "Torrent 2016", was conducted near Tengah Air Base in November 2016. Signs, street lights and other fixtures were removed, and landing equipment installed temporarily, which included mobile arresting gear for the first time. F-15SG and F-16C/D fighters participated in the 2016 exercise.[25][26][27][28]

South Korea
A South Korean Air Force Fairchild C-123K Provider aircraft waits to pick up troops at a highway landing strip during the joint South Korean/United States exercise "Team Spirit '89" on 24 March 1989.

As with North Korea, South Korea has also established a number of highway strips.

Sri Lanka

Tamil separatist group LTTE operated in northern Sri Lanka prior to their elimination in 2009, used highways as landing strips. [29][30]

Sweden
JAS 39 Gripen of the Swedish Air Force taking off from a road runway.
Main articles: Bas 60 and Bas 90

Sweden started establishing road runways (reservvägbaser) as alternative bases with the introduction of the Bas 60 system in the late 1950s. The Six-Day War in 1967 (where the Egyptian Air Force was grounded by a quick surprise attack on air bases) and the introduction of long range attack aircraft (primarily the Su-24) inspired further development, resulting in the Bas 90 system. Improvements in the Bas 90 system included construction of short backup runways in the direct vicinity of the air bases and further dispersion of ground operations. The Viggen and the Gripen were both designed with STOL capability in order to utilize shorter runways.[31][4][5][2]

The Swedish Air Force did not practice using their road bases for around a decade in the early 21st century, but in 2015 and 2016 its Saab JAS 39 Gripen fighters participated in Finnish Air Force road base drills.[17] In September 2017, the air force conducted exercises on a number of road bases for the first time in over a decade.[32][33]

Switzerland
A Swiss Air Force F-5E Tiger II crossing a road between the runway and an aircraft cavern (Mollis airfield, 1999).

A number of highway strips called NOLA/NOSTA (Notlandepisten) were set up from 1969 to 2004.[34][35][36]

Taiwan

Taiwan built a number of highway strips (戰備跑道, lit. "war spare runway").

USSR

A large number of highway strips were built in the former USSR (Аэродромный Участок Дороги, "airfield part of road").

  • Road runway section on Pakistan's M-2 Motorway with removable medians.
  • An A-10 Thunderbolt II aircraft lands on the autobahn A29 near city of Ahlhorn during NATO-exercise "Highway 84".
  • Rear view of an A-10 Thunderbolt II aircraft as it takes off from the autobahn A29 near city of Ahlhorn during NATO-exercise "Highway 84".
  • C-130 Hercules aircraft on taxidrive on the autobahn A29 near city of Ahlhorn during NATO-exercise "Highway 84".
  • Former road runway near Eneryda, Sweden.
  • Kortbana (short runway) at former Optand wartime air base, Sweden. Notice the road becoming wider.
gollark: Dimensions.
gollark: 1D political spectra are too reductive. I demand at least 3 (three (³)).
gollark: Finally, a vaguely good version of that memetic hazard, although the sentiment is still terrible.
gollark: Have you actually *tested* this or are you assuming you can infer such things?
gollark: You are not in containment at Anomalous Artifact Site-2991 → invalid.

See also

References
  1. "1967 Middle East War". BBC. Retrieved 1 May 2019.
  2. Andersson, Lennart (23 November 2006). "Svenska reservvägbaser" (PDF).
  3. Swiss Air Force, Uno Zero Zero – Ein Jahrhundert Schweizer Luftwaffe Archived 15 August 2016 at the Wayback Machine, Aeropublications, 2013, 324 pages (ISBN 978-3-9524239-0-5).
  4. Rystedt, Jörgen (25 April 2009). "Flygbassystem 90" (PDF).
  5. Törnell, Bernt (5 February 2007). "Svenska militära flygbaser" (PDF).
  6. "Puolustusvoimat" (in Finnish). Ilmavoimat.fi. Archived from the original on 25 June 2009. Retrieved 17 December 2015.
  7. Phillips, Graeme Highway doubles as flying doctor landing strip 23 July 2015 Government News Retrieved 21 February 2017
  8. RFDS Emergency Landing Strip, Eyre Highway, between Mundrabilla and Madura Pass, Western Australia Retrieved 21 February 2017
  9. "Inside look at China's highway strips". Global Times. 10 June 2014. Retrieved 16 October 2017.
  10. "China test flies warplanes on highway strip". http://eng.mod.gov.cn. Retrieved 16 October 2017.
  11. "Abandoned and Little-known Airfields: Cyprus, District Larnaca". Archived from the original on 3 November 2013.
  12. "Abandoned and Little-known Airfields: Cyprus, District Paphos". Archived from the original on 3 November 2013.
  13. "Watch an A-10 land on a highway for the first time since 1984". Washington Post. Retrieved 4 July 2018.
  14. "U.S. Air Force A-10 Attack Aircraft Practice Landings And Take Offs From Rural Highway And Austere Runway In Estonia". The Aviationist. 13 June 2018. Retrieved 4 July 2018.
  15. Engle, Eloise/ Paananen, Lauri (1973) The Winter War Sidgewick&Jackson ISBN 0 283 97949 6 p60
  16. Bitzinger, Richard A The Finnish Air Force Faces the 1990s July 1989 p4
  17. Finnish Hornets on the road Combat Aircraft Volume 18 Number 1 January 2017 pp70-75
  18. Lock, Alex Watch the military drill where Finland launches F-18s off of a highway 4 October 2016 Business Insider Retrieved 21 February 2017
  19. "Indian Air Force(IAF) Mirage -2000 Lands at Yamuna Expressway". Press Information Bureau. 21 May 2015. Retrieved 25 June 2016.
  20. Kumar, Deepak (21 June 2016). "Turning roads into runways may be a stretch and here is why". Moneycontrol.com. Retrieved 25 June 2016.
  21. "Air Force Planes Land On Highway Near Lucknow In 2-Hour Drill". NDTV India. 24 October 2017. Retrieved 24 October 2017.
  22. http://www.paf.gov.pk/press_release/uploaded/MOTORWAY-RELEASE02-04-10.pdf
  23. Combat Aircraft (European Edition) (magazine), September 2003, pages 76-79
  24. Factsheet: RSAF Exercise Torrent 2016 13 November 2016 Ministry of Defense Retrieved 24 February 2017
  25. 'Exercise Torrent 2016' Combat Aircraft Volume 18 Number 1 January 2017 p18
  26. Advisory on RSAF Exercise Torrent 2016 3 November 2016 Ministry of Defense Retrieved 24 February 2017
  27. "RSAF to conduct alternate runway exercise at Lim Chu Kang Road from Nov 10 to 14". The Straits Times. 3 November 2016. Retrieved 23 February 2017.
  28. Fighter jets, including new F-15SG planes, take off from Lim Chu Kang Road in RSAF's Exercise Torrent 13 November 2016 The Straits Times Retrieved 23 February 2017
  29. "Sri Lanka Guardian". Guardian General.
  30. "The Sunday Times".
  31. Rystedt, Jörgen (1 October 2005). "Flygbassystem 60" (PDF).
  32. "Se när JAS Gripen landar – mitt på vägen: "Det är old school"" (in Swedish). Retrieved 22 September 2017.
  33. "JAS 39 Gripen landar på vägbas på Gotland" (Press release) (in Swedish). 1 September 2017. Retrieved 22 September 2017.
  34. Luftwaffe, Denkmalschutz - Historische Militärbauten, armasuisse
  35. Militärflugplatz Autobahn, Peter Lewis, Peter Gunti and Oliver Borgeaud, October 2010
  36. Kalter Krieg auf der Autobahn, geschichte-muensingen.ch
  37. Video:1970: Autobahn Landung
  38. Video:Hawker Hunter jets taking off from motorways
  39. Aérodrome de fortune, fortlitroz.ch
  40. Video:L’armée suisse fait décoller des avions Tigers depuis une autoroute (1988), RTS
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