this post was submitted on 03 Dec 2024
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[–] [email protected] 36 points 2 weeks ago (3 children)
[–] [email protected] 9 points 2 weeks ago (3 children)

The children inside make it scary

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[–] [email protected] 9 points 2 weeks ago

I also really like that every time I see some dumb idea to "improve vehicles" there a long comment chain improving it even further into a train.

[–] [email protected] 26 points 2 weeks ago (3 children)

Well, the automotive industry has been working on making self driving a thing, and I recall when they first tried to tackle the problem of lane keeping.

The first proposal was to embed magnets or similar into the road surface that the car could have a set of sensors for to determine if it was drifting left or right in its lane.

Motherfucker, that's just a virtual track for your dumb four-wheeled mini-train.

It didn't catch on, but AFAIK it was implemented in small areas as a trial and it performed adequately given the technology of the time.

So I'm out here going, why the fuck are we pretending that vehicles are not just rail-free personal trains?

[–] [email protected] 8 points 2 weeks ago (3 children)

That's the end game for self-driving cars. They can drive close enough together to draft, efficiency goes way up. If a problem happens ahead, they communicate back so that pileups don't happen.

[–] [email protected] 5 points 2 weeks ago (5 children)

IMO, the big strength with self driving cars, if we ever get there is that level of car to car communication. The vehicle will be able to communicate ahead and see the best possible route, and where there's congestion etc, then optimize the drive to avoid unnecessary delays.

A big problem with human drivers is the tenancy for ghost traffic jams to occur. There was a test they did with about 10-20 drivers of all varieties put into cars and told to drive a circle track, following eachother. No other instructions were given. All they need to do was keep distance in front of them and everything would be fine, what was observed was that some drivers went more quickly than others, and would brake to a near stop when they came close to the person in front. In doing so, everyone ended up basically in stop and go conditions.

IMO, that test exemplifies the problem with human drivers. Put enough of them on the same road and given enough drivers and enough time, traffic/congestion will create slowdowns that otherwise shouldn't exist.

Taking people out of the equation means that all of the cars can accelerate at the same time and travel in tight packs, so merges are effortless because the entire system is working together to ensure that merging vehicles are able to merge (allowing sufficient space for them to merge), and perhaps more importantly, the merging cars will match pace with the flows of traffic already traveling on the road. Those are the two main tenants of a zipper merge. Find space to merge into, and match pace with the vehicles in the lane you are merging into. Seems that a lot of people forget that last bit.

So rush hour nonsense will at least be reduced.

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[–] [email protected] 12 points 2 weeks ago* (last edited 2 weeks ago) (2 children)

The first proposal was to embed magnets or similar into the road surface that the car could have a set of sensors for to determine if it was drifting left or right in its lane.

That's a thing for forklifts since what, a century? Even better, they use a wire with a set frequency instead of magnets, it's called wire guidance system.

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[–] [email protected] 14 points 2 weeks ago

There's two kinds of ground transportation: off-roading, and should be a train.

[–] [email protected] 1 points 2 weeks ago (1 children)

That's not true I likewise "invented" a blimp. With sails so it can really catch the wind.

[–] [email protected] 10 points 2 weeks ago (1 children)

Shit you may have nerd sniped me.

Could a blimp be sailed like a boat? I don't think so, it's a different physics problem. A sailboat is both hydrodynamic and aerodynamic, it's touching water and air, a blimp is only touching air. A sailboat can sail into a quartering headwind by turning the yards so they form an airfoil creating lift like an airplane wing in a mostrly forward direction, and it keeps from sliding sideways by the mass of the water interacting with the hull. A blimp with masts wouldn't do that, the wind will act on the envelope to just push it downwind, the sails might be able to drive it slightly forward so it goes slightly off to the side of downwind?

Also, to keep it from being blown over you'd have to hang the masts below the airship rather than above like a boat. Bouyancy is much more precious on an airship than a boat because air is a much bigger pain in the ass to be lighter than, so a deep keel full of lead like a sailboat ain't gonna cut it. Putting the masts on top would be too easy to blow over, if you hung them from below crosswinds might cause a rolling moment but it wouldn't roll all the way over.

Damn I wish they were still making Mythbusters. "Could an airship with sails sail into a quartering headwind? Or in any direction but downwind?"

[–] [email protected] 3 points 2 weeks ago (3 children)

I mean, the whole problem with airships is that they're just big inflatable sails, and to be barely economical they have just enough propulsive power to move about in normal weather conditions. Once they hit bad weather they're fucked, which is why nearly every airship built before WWII ended up crashing in a storm. They're only marginally viable today because of weather prediction that grounds them before they hit the shit. Adding sails isn't going to help anything.

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[–] [email protected] 57 points 2 weeks ago (2 children)
[–] [email protected] 9 points 2 weeks ago (5 children)

the last time I gave factorio a serious run was waaaay back in its beta, before it was even finished and had an end game.

its just gotten so complicated since then that I get overwhelmed, especially when you start to scale up and realize you fucked something up and have to undo an entire day of shit to move something 2 tiles or something.

[–] [email protected] 1 points 2 weeks ago (1 children)

This was me but I tried it a year ago 😂

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[–] [email protected] 19 points 2 weeks ago (1 children)

Train cars are crabs. They've got an exoskeleton, they're squat bodied, many legged, and have pincers on either side. All they have to do is start moving that body plan around some and they will be crabs.

[–] [email protected] 5 points 2 weeks ago

Checks out: while they CAN move forward, they highly prefer to move side to side

[–] [email protected] 15 points 2 weeks ago (1 children)

Crab-spotting is completely undervalued as a cultural activity.

[–] [email protected] 1 points 2 weeks ago

That girl had a crab ran on her last party.

[–] [email protected] 20 points 2 weeks ago* (last edited 2 weeks ago) (2 children)
[–] [email protected] 5 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

IDK why but I actually thought the title was this pun when I first read it. It was only after reading your comment that I realized that OP didn't actually cash in on the joke (skill issue, smh).

[–] [email protected] 3 points 2 weeks ago

You appear to have downvoted yourself.

[–] [email protected] 14 points 2 weeks ago

Cars in a station?

[–] [email protected] 7 points 2 weeks ago (1 children)

With how bad semis rut the road I've been wanting to see them with retractable train wheels on the back

[–] [email protected] 8 points 2 weeks ago

https://en.wikipedia.org/wiki/Intermodal_container this is kinda the same idea.. same container can be transferred from ship to rail to truck

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