Transport
Discover facts about transport. Small discoveries that change the way you see familiar things.
Transport
Why Elon Musk sent a Tesla into space
A new rocket needs a test payload with the right mass, and a car made a far better public spectacle than a block of concrete. So SpaceX sent a Roadster on the…
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Electronic monitors replaced railroad cabooses for checking brake failures
A sensor on the last car watches the brake-line pressure and radios the reading to the locomotive. The crew no longer needs a little office at the back of the…
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Why presidential trains need armor
Armor turns a presidential train into a moving protective room. Reinforced walls and windows help shield the people inside from gunfire and other attacks,…
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Sanitation trucks hydraulically crush their loads
Hydraulic cylinders push the truck’s packer plate through the refuse, compressing it into the body. The machinery turns a loose pile into a denser…
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The conveyor belt that carries ore for miles
A continuous belt runs over rollers, carrying ore from the mine toward processing without a parade of trucks. The belt keeps moving while the drivers get a…
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When monorails ran on wooden tracks
Some early monorails used a wooden beam as their guideway. Wheels straddled the beam to keep the car balanced, turning an ordinary timber into a one-rail…
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Why elevator ceilings have emergency hatches
If a car stalls between floors, trained rescuers use the ceiling hatch to reach it from above and carry out a controlled rescue. It’s an emergency access…
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Bank drive-throughs use pneumatic vacuum tubes
A pneumatic tube uses air pressure to shoot a sealed canister between the drive-through window and the bank. Cash and paperwork zip indoors while the customer…
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Coal is transported through massive slurry pipelines
Coal is crushed into small particles and mixed with water, making a slurry that pumps through a pipeline. At the destination, the coal is separated from the…
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Refrigerated trailers maintain freezing temperatures
A reefer trailer is an insulated box with its own refrigeration unit, which chills and circulates air around the cargo. The truck hauls the food; the little…
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Intercontinental pipelines move pressurized gas
Pressurized gas flows from higher pressure toward lower pressure through the pipeline. Friction against the pipe gradually drains that push, so compressor…
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Moving platforms broadcast endless warning loops
A moving walkway has no natural starting line: passengers step on all along its length. Repeating the warning gives each rider a chance to hear it, even if…
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Forklifts carry a hidden iron counterweight
The load hangs in front of the front axle, so a heavy iron weight at the back balances the forklift like the other end of a seesaw. Without that…
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Fire alarms force elevators to the ground floor
When an alarm sounds, the elevator returns to a designated floor and opens its doors, clearing it for emergency use. It ignores ordinary calls on the way…
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Suspended monorails hang beneath their tracks
The cars hang below the rail, putting their center of gravity beneath the track. Like a pendulum, the load hangs steady instead of perched on top—an…
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Armored bank trucks have no rear windows
Opaque rear walls hide the cargo and remove glass that thieves could smash. The crew loses a rear view, so mirrors and cameras do the watching; the truck’s…
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Escalators have a hidden reverse key
Behind the panels, a maintenance key controls the motor’s direction. Staff use it to set the escalator for the flow of foot traffic; the key stays out of…
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Why airport moving walkways are so slow
A moving walkway is set at a modest speed so people can step on and off without treating the entrance like a launch ramp. Walk faster if you’re in a hurry;…
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Concrete mixers spin to prevent solidifying
The drum’s turning paddles lift and fold the concrete, keeping cement, water, sand, and gravel mixed while the truck travels. Without that steady tumble, the…
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Logging trucks secure raw timber on skeletal frames
A logging truck’s bare frame leaves room for long trunks, while upright stakes and chains keep the load from rolling off. The logs make their own awkward…
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Articulated dump trucks bend in the middle
A joint between the front and rear frames lets an articulated dump truck bend to steer. Its wheels follow the turn across rough ground, while the middle hinge…
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Railway sleeping carriages feature folding bunk beds
Foldaway bunks turn a narrow rail compartment into sleeping space at night and seating space by day. The beds disappear against the wall, making one small…
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London once ran a railway that carried only mail
Mail Rail moved post through dedicated tunnels beneath the city, avoiding street traffic. Its small electric trains operated without drivers on board. From…
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Pneumatic transit systems struggle with friction
A pneumatic train needs pressure to push its car, but the car’s piston must slide through a close-fitting tube. Tight seals create friction; loose seals leak…
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