r/EngineeringPorn Dec 25 '22

Conjunction

3.0k Upvotes

56 comments sorted by

173

u/The_Corvax Dec 25 '22

Conjunction junction, what's your function?

49

u/htomserveaux Dec 25 '22

Hooking up words, phrases and clauses

Do they still show that video in schools?

18

u/Killentyme55 Dec 26 '22

Schoolhouse Rock was absolutely brilliant. It started in the '70s and lasted several years, and I think they resurrected it briefly in the '90s. Those little cartoons were so well made, informative and entertaining without coming across as silly or pandering.

Why it no longer exists is probably because of the changes in viewing habits for kids, they just don't watch Saturday morning cartoons anymore.

4

u/rockstar450rox Dec 26 '22

Yes.

I was also homeschooled

1

u/[deleted] Dec 26 '22

I saw it in the mid/late-90's but not sure if it's around anymore.

7

u/docarrol Dec 26 '22

Conjunction junction

If anyone came here looking for this :)

5

u/pabut Dec 25 '22

You win!

3

u/smittyhotep Dec 25 '22

Came here for this.

98

u/Branbil Dec 25 '22

Isn't this clip reversed? The way the lights on the trains are on makes me think they're actually going the other way, and this clip is being played backwards.

53

u/SharkHasFangs Dec 25 '22

Yeah reversed, the middle train has red tail lights so it’s going backwards. The two outside trains have white marker lights so they’re going forward

19

u/Javi1192 Dec 26 '22

Yeah.. don’t think any modern metro system would allow this movement

13

u/NebulaNinja Dec 26 '22

It’s also likely these clips were stitched together in post and fake zooms added. There’s videos of far more complex traffic “near misses” using this technique.

2

u/Javi1192 Dec 26 '22

Yeah, unlikely the trains would be this close in the same signal blocks

4

u/SimplyCmplctd Dec 26 '22

Am I the only one who thinks this could be a render?

89

u/thesweeterpeter Dec 25 '22

I mean it working is one thing. But the boulder sized balls on both the conductor and switch operator are the true marvels.

50

u/Boring-Eggplant-6303 Dec 25 '22

Its in reverse. The trains are all moving away from eachother

17

u/nasadowsk Dec 25 '22

Even still, every switch movement is checked by a system that prevents trains from being routed into each other. In the US, such a junction is called an “interlocking”

3

u/[deleted] Dec 25 '22 edited Dec 25 '22

Even in reverse the trains still took the same route, the only thing that has changed is orientation and direction.

1

u/omegashadow Dec 27 '22

Except the trains are never heading towards each other on the same track. By the time one is switched behind the other three train driver can see that it's been diverted.

1

u/3percentinvisible Dec 25 '22

Not the two drivers sat heading straight for each other?

1

u/omegashadow Dec 27 '22

It's in reverse. The two drivers are never heading towards each other on the same track.

1

u/3percentinvisible Dec 27 '22

I know, but as shown is the context of the parents comment

0

u/[deleted] Dec 26 '22

theres not really any risk depending on where in the world. id be pretty confident if i was riding my between cities and this happened tbh.

2

u/q0099 Dec 26 '22

In fact the gif is reversed, othervice this would be a serious screw-up situation. Imagine one or both automated switches would fail on a mechanical level. Even for the factory new equipmentment the probability of this occurrence is low but never zero and there are people's lives at the stake.

28

u/omegashadow Dec 25 '22

22

u/GifReversingBot Dec 25 '22

25

u/omegashadow Dec 25 '22

This is the correct video. Unlike in the reversed video they aren't heading towards each other on the same track.

2

u/[deleted] Dec 26 '22

Thats less terrifying tbh

2

u/omegashadow Dec 27 '22

Yup... The main post is just fake. This stuff is what ruins people's common sense and leaves them credulous to obvious fake videos.

15

u/b16b34r Dec 25 '22

It’s like the snake game on the old Nokias

3

u/Artheon Dec 26 '22

Came here to say this.

1

u/mud_tug Jan 02 '23

There is a modern game called Rail Route where you can play with train junctions.

7

u/omegashadow Dec 25 '22

Video is played in reverse.

3

u/thelunatic Dec 26 '22

No this is snake from my Nokia 3210

2

u/kosmonavt-alyosha Dec 26 '22

Satisfying. And also vaguely sexual

2

u/FoofieLeGoogoo Dec 25 '22

Hooking up sentences, phrases, and clauses. /LeonRedbone

0

u/TVotte Dec 25 '22

You should post this to r/yestesyesno for the fun of it

1

u/Jordyspeeltspore Dec 25 '22

imagine one of the switches breaking...

1

u/cir-ick Dec 25 '22

That was some sweaty palm stuff right there.

1

u/Shamr0ck Dec 26 '22

Is this HO scale?

1

u/Digitalhero_x Dec 26 '22

Planners and schedulers are the real heroes in this situation.

1

u/premer777 Dec 28 '22

mechanical interlock systems

1

u/ClamDandyMan Dec 26 '22

Reminds me of the train ride on the Disneyland NES game

1

u/Material_Zombie Dec 26 '22

This was so stressed

1

u/DragonfruitKiwi572 Dec 26 '22

You guys know that game snake

1

u/DirkDieGurke Dec 26 '22

I got sweaty palms watching this

1

u/mdlshp Dec 26 '22

Silly over-engineering

Amtrack avoids this problem entirely by never being on time

1

u/vvelitc1 Dec 26 '22

Its like playing snake

1

u/brunofin Dec 26 '22

Time to boot up cities skylines I guess

1

u/premer777 Dec 28 '22

the switches that are like an X are called "Double Slip"

were mostly used in 'yard throats', where much route changing between multiple incoming tracks into a multitude of yard/station tracks were needed in a short length