Cars and trucks are banned from the city (they will travel in tunnels underground) allowing for narrow streets and alleys.
Mr Gao, it should be noted, was born in 1939 while his parents were hiding from the Japanese in tunnels.
In certain cases, such as in tunnels, communication is lost completely.
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Terry Morgan, a former boss of Tube Lines, used to describe how his engineers had spent months checking wiring in tunnels and drawing circuit diagrams from scratch.
For nature lovers, Atlantis offers the world's largest collection of outdoor marine habitats (11 lagoons, including ones with hammerheads, stingrays or turtles) and walk-in aquariums in which quests can watch marine life from glassed-in tunnels.
These are propellers mounted in transverse tunnels in the hull, to help position the craft and hold her stable while alongside a rig.
They sprout, grow and bloom in unexpected places, around glittering new skyscrapers, in subway tunnels and in parks.
In the tunnels, Lamborghini drivers exalted in waving at each other and creating as much of the amplified noise as possible (click here and turn up the volume to get a taste from a 30-second video I took).
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Compared to the power tunnels in Park Royal these tunnels are much larger.
The graffiti in the tunnels, the creaking of the elevated trains, the performers that filter in and out: It's really the only place where the rich and poor, the ugly and beautiful, rub shoulders.
In southern Austria, at least 29 people were injured - six seriously - in two accidents inside road tunnels in the state of Styria, ORF reported.
To ensure functionality in flooded tunnels, Gemini-Scout's controls and equipment needed to be waterproof.
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Paddick said it wasn't clear whether the bombs were on the trains or in the tunnels.
The emergency platforms have become standard in Switzerland after a series of fatal fires in Swiss tunnels.
Imagine 10 men in 10 tunnels - the process of extracting us would take that much more time.
Emergency stops, like the one the bus hit, are common in many of the recently built tunnels in Switzerland.
Humans were tested naked in wind tunnels to assess the impact on temperature.
And in the event of a major flood, the MTA will deploy heavy duty pumping trains to remove water trapped in the tunnels beneath the rivers.
They root around in mucky tunnels and caverns, greeted only by white speckled apparitions that look like holographic versions of the phosphorescent guy we saw earlier.
He said the decision to auction the vehicle had "caused a fair amount of controversy, " with some people preferring it was left in the tunnels as a hidden memorial.
Flooding from the same storm destroyed a signal array in the tunnels beneath the Hudson, and knocked out train service between New Jersey and lower Manhattan for 10 days.
They were unaware of their utter freakishness, unaware that the world found them absurd, as they toiled in the tunnels below the Famous Directors and the Masters of Horror, like clueless C.
I've been trying to get inside the tunnels for a while and on Thursday I was given the first rare opportunity to have a look and film in the tunnels deep under west London.
On the eve of Thanksgiving, several days before the World Trade Center line reopened, Mr. Lejda and a colleague walked through the river tube, he said, hanging up speed limit signs in the tunnels, since the train operators would be without the lighted signals that usually signal when and where to slow down.
Earlier on Tuesday, motorists faced delays on the A55 in Penmaenmawr, Conwy, while icicles were cleared from tunnels in the area.
Sea water will be pumped in via underground tunnels 2-3km (1.2 to 1.8 miles) in length to cool the two nuclear reactors and then back to the Bristol Channel.
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Gorelick acknowledged the World Trade Center was the last successful terrorist attack on the U.S. from outside the country, but pointed to the foiled plots to bomb U.S. airliners in Asia, and to destroy tunnels and bridges in New York as evidence of a continuing overseas terrorist threat.
Previously unprinted information on German tunnels in the Bailiwick of Guernsey has been released.
The agency also controls a portfolio of seven bridges and two tunnels in the city.
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