An airport runway six stories tall, which stunned the public and county commissioners a month ago, has been selected as the preferred design for Broward County’s controversial expansion.
The $791 million expanded runway at Fort Lauderdale/Hollywood International Airport will slowly slope upward to a height of about 65 feet, an eye-popping design that airport officials said Tuesday will be safe.
The runway rises gradually over a span of 8,000 feet as it heads east, until it reaches its full six-story height and ends abruptly with a retaining wall. Planes will land about 1,500 feet away from the sky-high edge, county consultants said.
The runway expansion, which has a ribbon cutting date set for Sept. 18, 2014, is easily the most controversial project of the County Commission.
bohica From United States of America, joined Feb 2004, 2562 posts, RR: 0 Reply 10, posted (3 years 6 days 4 hours ago) and read 25237 times:
Quoting flyusairways (Reply 6): Perhaps I'm missing something, but what is the reason such a large slope is necessary? Is it simply so that the interstate and railroad tracks can pass underneath?
Basically, yes. In Florida, the water tables are too close to the surface. Therefore, tunneling a highway or railroad is not possible. If you did, the tunnels would be flooded all the time. This is the reason that Miami's Metro is mostly elevated with a small portion on the surface. None of it is underground.
nycdave From United States of America, joined Aug 2010, 539 posts, RR: 1 Reply 13, posted (3 years 6 days 3 hours ago) and read 25026 times:
Agreed that it makes sense. Building a tunnel in saturated soil isn't terribly easy, or cheap -- among other issues, you have to build a "gravity slab" to keep the whole assemblage from being buoyed up by the water!
Besides, Florida could use some topographic varation... even if it IS man-made!
PITrules From United States of America, joined Jun 2000, 2890 posts, RR: 4 Reply 15, posted (3 years 6 days 3 hours ago) and read 24882 times:
Seems like there is plenty of space to re-route US 1 to the east.
US 1 is only a divided expressway to the east of the airport. It reverts back to city streets with traffic lights immediately north and south of the airport. Kinda pointless; I don't see why they just don't divert it to the east and square it off some on the way south since its reverts back to city street anyway.
And what was the thinking behind that ridiculous 270 degree entrance ramp coming down from the north? Looks like a simple 80 degree entrance would've worked while still preserving the space for the terminal 1 expansion that was planned.
atcsundevil From United States of America, joined Mar 2010, 801 posts, RR: 2 Reply 16, posted (3 years 6 days 2 hours ago) and read 24757 times:
They could always take a page from Phoenix's book and build a 100' bridge over their taxiways! I think this is kind of an interesting idea, but I kinda get the feeling that they're doing this moreso because they just can. My guess is that there are other options that are less extreme. I'll be interested to see if this preferred design actually becomes a reality.
cloudyapple From Hong Kong, joined Jul 2005, 2447 posts, RR: 9 Reply 17, posted (3 years 6 days ago) and read 24517 times:
The problem will be that if someone at the runway holding point has a problem and needs to taxi back to gate, because of the single parallel taxiway and with no connection until basically 2/3 back down because of the grade, you'll end up with a huge operational problem to taxi the guy back on the runway or stopping any more departures from coming up the taxiway for 5 to 10 minutes. It's may not be a big issue all the time but certainly during peak hours when the demand is high, this is a big business risk.
OB1504 From United States of America, joined Jul 2004, 3151 posts, RR: 7 Reply 19, posted (3 years 5 days 23 hours ago) and read 24194 times:
Quoting bohica (Reply 10): Basically, yes. In Florida, the water tables are too close to the surface. Therefore, tunneling a highway or railroad is not possible. If you did, the tunnels would be flooded all the time. This is the reason that Miami's Metro is mostly elevated with a small portion on the surface. None of it is underground.
Then again, it's not impossible. We have the US 1 tunnel under the New River just a few miles north of the airport, and the new Port of Miami access tunnel being built to the south.