How long is the tunnel in Hai Van Pass?

How long is the tunnel under Mobile Bay?

Ah, the underwater burrow to Mobile, eh? It stretches a grand 3,389 feet! Or, for those who prefer thinking in meters, picture a kilometer with a smidge missing – 1,033 meters to be precise.

Only two lanes? Seriously? Like sharing your closet, only less fun. And clearance? A whopping 12 feet. My dreams of driving a monster truck there are officially squashed. Width, a generous 21 feet. Hope you like your fellow driver. Intimately.

Bet you didn’t know the tunnel is basically a concrete submarine! Built using the sunken tube method. Think LEGOs for grown-ups, only way bigger. And wetter.

Plus, it’s not just for getting from A to B. Nope. It’s a time capsule of questionable fashion choices zooming underneath. Seriously, imagine all the 2024 hairstyles down there.

• Important Numbers:
  • Length: 3,389 feet.
  • Lanes: a pair. Like socks.
  • Clearance: 12 feet.
  • Width: 21 feet. Roomy-ish?
• Interesting Fact: Sunken tube construction! Like building an aquarium, but with cars.
• Random: Hope your GPS doesn’t freak out. Mine gets existential near bridges.

How long is the tunnel in Hokkaido?

Hokkaido tunnel… 53.8 kilometers, that’s long! Over thirty-three miles. Crazy, huh? A good chunk, like, almost half, is under the Tsugaru Strait. That’s the water between Honshu and Hokkaido. You know, main island, northern island. Separates em. They started digging in ’64. Finished it way later, ’88. Took forever. It’s for trains, by the way. Japanese National Railways thing. Remember my uncle worked on something like that, bridge building, back in ’88. Different, obvi. But still big project.

• 53.8 km (33.4 mi) total length
• 23.3 km (14.3 mi) under the Tsugaru Strait
• 1964: Construction began
• 1988: Construction completed
• Japanese National Railways sponsored the project
• Carries a rail line

My cousin, Kenji, he rode that train through the tunnel, like, ten years ago. Said it was kinda boring, just dark. But fast. Saves a ton of time. Imagine the engineering! Like, how do they even ventilate a tunnel that long?? Wild. My uncle, the bridge guy, he always said ventilation was the hardest part of his projects, even tho they were above water. Wind, rain. Different problems, i guess. Crazy projects.

What are the ventilation requirements for tunnels?

It’s late. 200 cubic feet… that number feels so arbitrary, you know?

Fresh air per minute. They say it’s enough. Is it ever really enough, though?

Underground. Always underground, isn’t it? Mechanical ventilation is mandatory when nature fails.

• 200 cubic feet of fresh air per minute.
• This is per employee.
• Natural ventilation first.
• Mechanical backup. Always.

What is the road between Hue and Da Nang?

The Hải Vân Pass. Iconic. Not the longest, but the route. Hue to Da Nang. Actually, it’s between Hue and Hoi An. Stunning coastal views.

Key features:

• Breathtaking scenery: East Sea backdrop.
• Historic significance: A strategic border.
• Challenging drive: Winding mountain roads. My friend crashed his motorbike there last year. Seriously.
• Tourist hotspot: Expect crowds.

Alternative routes: National Highway 1A exists. Consider traffic. Avoid rush hour if you value your sanity. My experience: pure chaos on NH1A during Tet.

Avoid the less scenic routes. They’re boring. Trust me. I know Vietnam.

Does the tunnel in Mobile go underwater?

Yep, that Mobile tunnel goes underwater, like a crawfish hiding from a heron!

Think of the Bankhead Tunnel as Mobile’s bathtub, just way longer and less bubbly. Completed way back in ’41 (at a price tag that would make your eyeballs pop, $4M!), it dips under the Mobile River.

• It’s underwater: like a submarine sandwich.
• It’s long: 3,389 feet; that’s like a bunch of football fields end-to-end.
• It’s deep: 49 feet below the average high water mark. Imagine stacked refrigerators.

Seriously, it connects Government Street to Highway 90 East.

How deep is the Gotthard Base Tunnel?

Fifty-seven kilometers? That’s like walking from my apartment in Zurich to… well, almost Bern. A ridiculously long commute, even for a Swiss train. The depth? A staggering 2,300 meters. That’s deeper than the Mariana Trench… almost. Almost. Don’t tell the oceanographers I said that.

Key facts:

• Length: 57 km (a truly impressive distance)
• Depth: 2300 meters (that’s like stacking the Eiffel Tower about twice)
• Tunnels: Two single-track behemoths.

Think of it this way: if you dropped a giant fondue pot into it, it would take ages to reach the bottom, assuming it didn’t melt first. Swiss engineering, huh? Precise, efficient, and slightly terrifying in its scale. It’s like a mole’s ambitious attempt at creating the ultimate burrow.

One might even say, it’s the ultimate Swiss Army knife… for trains. Seriously, the logistics of building that thing are mind-boggling. I’d need more than one bottle of my favorite Swiss wine to process it all.

More info: The GBT opened in 2016 and is a marvel of engineering. Its construction presented unique geological and logistical challenges, notably dealing with the extreme pressure at such depths. The project involved the use of giant Tunnel Boring Machines (TBMs). The entire thing is seriously impressive, even if a little unnerving to think about. Think: claustrophobia multiplied by fifty-seven kilometers.

Is the Chunnel claustrophobic?

Airiness, movement between carriages. No claustrophobia. Faster than ferries. Ear-plugs needed for announcements.

Key improvements: Speed, comfort.

Drawbacks: Annoying announcements.

• Speed: Significantly faster than ferry travel. My personal experience: 2023 trip.
• Comfort: Spacious. Inter-carriage movement possible.
• Noise: Safety announcements overly loud. Ear protection recommended.