Transport
Discover facts about transport. Small discoveries that change the way you see familiar things.
Transport
Cable car bells are rung using a complex brass pull rope
The operator pulls a brass-linked rope that swings a striker into the bell. That clanging signal warns people ahead, turning a length of cable into a…
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The planted bridges that keep animals off roads
A planted wildlife bridge gives animals a vegetated route over a road, reconnecting habitat that traffic split in two. The greenery makes the crossing look…
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How darkness makes Space Mountain feel faster
Your eyes help your brain judge motion by watching the scenery rush past. Space Mountain takes that evidence away, leaving turns and acceleration to do the…
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Why sinking ships can drag swimmers underwater
As a large hull sinks, it pushes and drags water downward around it. A swimmer close to that moving mass gets caught in turbulent water, with debris and…
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Automatic car washes really do attack your car
The brushes don’t just touch the car; they carry whatever dirt the last vehicle left behind. That grit rubs against the paint as the rollers spin, so the…
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Why moving trucks get stuck under bridges
A moving truck’s cab sits low, but its tall cargo box rises far above the driver’s eye line. If the posted clearance is lower than the box, the bridge meets…
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Ziplines exist purely for downward sliding
The cable’s downward angle gives gravity a forward pull, while the trolley rolls along instead of scraping. No motor needs to chase you: the planet supplies…
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A toy gun can still get you detained at airport security
A realistic toy gun still has the shape of a real weapon on an X-ray or in a crowded checkpoint. Security has to treat the outline as a threat until it’s…
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Pedicab drivers require specialized permit approvals
A pedicab carries paying passengers on public streets, so permits let local officials check the vehicle and regulate where it operates. The driver pedals; the…
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Gases escaping through ridiculously tiny holes
Gas molecules move in every direction, and a pressure difference gives more of them a reason to escape through a tiny opening than to return. Even a pinhole…
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Roundabouts can save fuel by keeping traffic moving
A roundabout keeps cars rolling instead of making them stop, idle and burn extra fuel before accelerating again. Smooth movement saves fuel—and spares drivers…
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Elon Musk built a tunnel company over LA traffic
Musk’s Boring Company grew out of a simple frustration: surface roads turn every commute into a contest for the same patch of asphalt. Its answer was to dig…
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Why police cars often stay running
An idling engine keeps the radio, lights, and onboard equipment powered while the car stays ready to move. The cruiser is parked; its engine did not get the…
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Car defrosters automatically turn on the compressor
The air conditioner’s compressor removes moisture from the air; the defroster then warms that dry air and blows it across the glass. The windshield clears…
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Ground effect drastically boosts lift near landing strips
Close to the ground, a wing’s downwash has less room to spread, which reduces drag from making lift. The aircraft feels more buoyant near the runway—the air…
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Helicopter doors are frequently removed
Removing a helicopter door cuts weight and clears the opening for photographers or crews who need an unobstructed view. The aircraft loses a little protection…
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A fire pole saves seconds but creates a fall risk
The pole bypasses stairs, but firefighters still have to make a controlled descent under pressure. Some newer stations avoid the problem with a single-story…
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Portland aerial tram connects city districts through the sky
Two cabins travel on cables between Portland’s riverfront and the hilltop above it. Their steep aerial route skips the winding streets below, turning a…
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An upright airplane seat gives the row behind you more room
During takeoff and landing, cabin crew normally require seat backs to be upright. That preserves space for passengers behind the seat to move and leave their…
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Why ostriches run on just two toes
An ostrich’s two toes keep its legs light, and the large inner toe ends in a sturdy nail that grips the ground at speed. Less foot to swing means less weight…
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Alpine snowboards utilize extremely stiff boots for carving
Stiff alpine snowboard boots pass pressure from your legs to the board’s edge with little delay. That makes a hard, precise carve easier to control—your…
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Windshield wiper fluid is predominantly methanol
Methanol lowers the fluid’s freezing point, so it stays liquid when water alone would turn to ice. It also helps loosen grime. Your windshield gets a cocktail…
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Why tanks can become ovens in the sun
Sun heats the tank’s steel shell, then the metal passes that heat into a cramped interior with little airflow. Add engine heat and the crew gets a rolling…
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Tumpline straps shift heavy carrying weight to your forehead
A tumpline runs from the load over the carrier’s forehead, transferring much of the weight through the head and spine. Lean forward to balance it and your…
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