Sonic From Lithuania, joined Jan 2000, 1671 posts, RR: 0 Posted (12 years 3 months 2 weeks 18 hours ago) and read 8511 times:
Well, while travelling in certain states I've seen that there are places where road suddenly turns wider and marking of it changes. Guide told us this could be used as an emergency landing strip for planes. I would like to ask, what planes could land on such "strips"? Only personal props or also jets, or even passenger jets if the "runway" is long enough. And what happens to cars in such a landing - most probably wouldn't stop in a time and could crush into plane. Police wouldn't arrive quickly enough to block off the road.
Also, from here comes another theoretical question: would it be technically possible to enclose a straight portion of highway (for example, direct cars to another roads) and use it as an airport if, for example, other airport(s) in country/region are destroyed or made unusable by war or some natural disasters (volcanoes, tornadoes, earthquakes, etc.)?
Jetguy From , joined Dec 1969, posts, RR:
Reply 2, posted (12 years 3 months 2 weeks 18 hours ago) and read 8478 times:
That's correct. It's a legacy left over from the cold war. The Interstate Highway system was originally designed and built back in the 50's and 60's. I believe that Sweden and the former Soviet Union have the same capability built into some of their roads.
Is one mile out of every five on Interstate highways straight for emergency airplane landing strips?
Absolutely not! According to Richard F. Weingroff, who works in the Federal Highway Administration's Office of Infrastructure, says "No law, regulation, policy, or sliver of red tape requires that one out of five miles of the Interstate Highway System must be straight."
B747skipper From , joined Dec 1969, posts, RR:
Reply 5, posted (12 years 3 months 2 weeks 17 hours ago) and read 8466 times:
Be aware that the Swiss Air Force, and I believe Swedish Air Force as well, has some type of provisions, where they use roads for their airplanes...
I hope the autobahns... or interstates so designated, will not have a speed limit for the airplanes... I refuse to land a 747 at 120 kph...
LY744 From Canada, joined Feb 2001, 5536 posts, RR: 9
Reply 6, posted (12 years 3 months 2 weeks 17 hours ago) and read 8444 times:
Common practice in the former USSR, related to the Cold War as was already mentioned. Obviously not intended for civilian use, but rather for emergency (as in war, where traffic would not be much of a concern) military one. Israel also has at least one of those, they actually use it for practice once every few years (shutting the freeway down and flying F-16's etc. out of there). There are white threshold bars on every end of the portion of the highway used as a runway, I bet most motorists get pretty darn confused seeing what seems like a European pedestrian crossing in the middle of a freeway.
Shaun3000 From United States of America, joined Mar 2002, 445 posts, RR: 0
Reply 9, posted (12 years 3 months 2 weeks 15 hours ago) and read 8406 times:
There are lots of reasons the road would suddenly widen. The most common reason for this is future expansion.
I've seen many bridges that are wide enough for 6 or 8 lanes that only have four going across it. It's cheaper to built a larger bridge than it is to build a smaller one and then tear it down and build a larger one when the time comes.
Indianguy From , joined Dec 1969, posts, RR:
Reply 10, posted (12 years 3 months 2 weeks 13 hours ago) and read 8380 times:
Recently when tensions between india and Pakistan had increased, the Paki's had practised using a highway outside islamabad to operate fighters and bombers. This was becuase it was almost certain that IAF bombers would most certainly take out their airfields in the event of a conflict.
Garuda From Indonesia, joined Nov 2000, 584 posts, RR: 2
Reply 11, posted (12 years 3 months 2 weeks 12 hours ago) and read 8364 times:
There are certain highways and roads in Singapore which can be used as emergency runway. The RSAF did couple of take-offs and landings on those places couple of months ago, and it was covered by the local TVs and newspapers. But they only used fighter jets such as F16s.
Positive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 14, posted (12 years 3 months 2 weeks 8 hours ago) and read 8316 times:
Here in Australia the Royal Flying Doctor Service routinely lands their PC-12's and King Air 200's on outback roads where runways are unavailable. Sometimes they even land at nighttime using only car headlights as runway lights. I'd say a small jet i.e a Lear 35 or a Citation would be a piece of cake to land on an Interstate- but something like a 747 might have too big a wingspan.
Mbremer From Germany, joined Aug 2001, 10 posts, RR: 0
Reply 15, posted (12 years 3 months 2 weeks ago) and read 8219 times:
In Germany there are quite a few of them in both former west and east; relicts of the cold war.
They were intended as emergency operation strips for the military in case of a war. They would have been used as a replacement for possibly destroyed airports as well as operating bases for other air wings flown in from elsewhere.
OPNLguy From , joined Dec 1969, posts, RR:
Reply 17, posted (12 years 3 months 1 week 6 days 17 hours ago) and read 8121 times:
>>>Jetliners might be hard on the roads. In the States the concrete was spec.'d at 11" thick compared to 27" thick for the Autobahn.
Precisely why I had to snicker at the B727 emergency landing scene in "U.S. Marshalls."
To best visualize an aicraft landing on a pavement surface not anywhere near properly stressed for the weight, imagine an elephant riding on a ten-speed bike on a long path of saltine crackers. You get the idea...
Chief From United States of America, joined Nov 2002, 89 posts, RR: 0
Reply 18, posted (12 years 3 months 1 week 6 days 14 hours ago) and read 8086 times:
We used it once near Glen Allen, Alaska. The last airline I worked for we had in our Op's Spec's, provisions to land an "air ambulance" on rural roads. This was the Cessna C-441 Conquest, contact had to be established with the Alaska State Troopers with them shutting down the road with their cars on either end. Day VFR rules applied. The Troopers had hand held VHF R/T's, the airfield was snowed in and it was a rather nasty auto accident. It was a long strait stretch of highway not encumbered by road side brush.
Yes the Conquest is an A/C that can fly very high, (35K), very fast, (290 indicated). It does so because it has fat wings with very low wing loading and very powerful engines, (Garrett TPE 331'S). But because of that wing design it can also maneuver at very low speeds. Add to this mix the main gear is a "trailing link" design, very forgiving to the A/C structure in a firm landing situation. On top of that, let me mention again the engines installed on this A/C, Garrett TPE 331- 8, or 10N's. Engine power, or thrust is instantaneous with power lever movement. Directional control is easily maintainable by the pilot.
Musang From United Kingdom, joined Apr 2001, 901 posts, RR: 6
Reply 21, posted (12 years 3 months 1 week 1 day 7 hours ago) and read 7801 times:
Re. Singapore again, that stretch of the East Coast Parkway has no permanent centre divider (its made up of plants in pots and wooden enclosing fences) and there are no street lights or tall trees at the edges.