frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

RPG in a Box

https://rpginabox.com/
136•skibz•3d ago•17 comments

Bus stops here: Shanghai lets riders design their own routes

https://www.sixthtone.com/news/1017072
196•anigbrowl•3h ago•130 comments

Writing that changed how I think about programming languages

https://bernsteinbear.com/blog/pl-writing/
63•r4um•4h ago•4 comments

Ash Framework – Model your domain, derive the rest

https://ash-hq.org/
41•lawik•3d ago•3 comments

Type-constrained code generation with language models

https://arxiv.org/abs/2504.09246
192•tough•10h ago•69 comments

Flattening Rust’s learning curve

https://corrode.dev/blog/flattening-rusts-learning-curve/
228•birdculture•10h ago•163 comments

How to Build a Smartwatch: Picking a Chip

https://ericmigi.com/blog/how-to-build-a-smartwatch-picking-a-chip/
6•rcarmo•1h ago•0 comments

Branch Privilege Injection: Exploiting branch predictor race conditions

https://comsec.ethz.ch/research/microarch/branch-privilege-injection/
367•alberto-m•15h ago•149 comments

Replicube: A puzzle game about writing code to create shapes

https://store.steampowered.com/app/3401490/Replicube/
54•poetril•6h ago•13 comments

Google is building its own DeX: First look at Android's Desktop Mode

https://www.androidauthority.com/android-desktop-mode-leak-3550321/
315•logic_node•18h ago•243 comments

Show HN: HelixDB – Open-source vector-graph database for AI applications (Rust)

https://github.com/HelixDB/helix-db/
164•GeorgeCurtis•15h ago•70 comments

Mipmap selection in too much detail

https://pema.dev/2025/05/09/mipmaps-too-much-detail/
48•luu•3d ago•12 comments

Launch HN: Miyagi (YC W25) turns YouTube videos into online, interactive courses

176•bestwillcui•19h ago•99 comments

Build real-time knowledge graph for documents with LLM

https://cocoindex.io/blogs/knowledge-graph-for-docs/
128•badmonster•12h ago•21 comments

Failed Soviet Venus lander Kosmos 482 crashes to Earth after 53 years in orbit

https://www.space.com/space-exploration/launches-spacecraft/failed-soviet-venus-lander-kosmos-482-crashes-to-earth-after-53-years-in-orbit
141•taubek•3d ago•99 comments

PDF to Text, a challenging problem

https://www.marginalia.nu/log/a_119_pdf/
282•ingve•17h ago•156 comments

Multiple security issues in GNU Screen

https://www.openwall.com/lists/oss-security/2025/05/12/1
371•st_goliath•21h ago•224 comments

EM-LLM: Human-Inspired Episodic Memory for Infinite Context LLMs

https://github.com/em-llm/EM-LLM-model
52•jbotz•4d ago•6 comments

Airbnb is in midlife crisis mode

https://www.wired.com/story/airbnb-is-in-midlife-crisis-mode-reinvention-app-services/
146•thomasjudge•13h ago•260 comments

Fingers wrinkle the same way every time they’re in the water too long

https://www.binghamton.edu/news/story/5547/do-your-fingers-wrinkle-the-same-way-every-time-youre-in-the-water-too-long-new-research-says-yes
125•gnabgib•8h ago•51 comments

Simplifying the Ethereum Layer 1

https://vitalik.eth.limo/general/2025/05/03/simplel1.html
4•gasull•3d ago•2 comments

It Awaits Your Experiments

https://www.rifters.com/crawl/?p=11511
163•pavel_lishin•17h ago•58 comments

Using obscure graph theory to solve programming languages problems

https://reasonablypolymorphic.com/blog/solving-lcsa/
61•matt_d•12h ago•9 comments

Garbage collection of object storage at scale

https://www.warpstream.com/blog/taking-out-the-trash-garbage-collection-of-object-storage-at-massive-scale
75•ko_pivot•3d ago•9 comments

The world could run on older hardware if software optimization was a priority

https://twitter.com/ID_AA_Carmack/status/1922100771392520710
683•turrini•22h ago•626 comments

OpenTelemetry protocol with Apache Arrow

https://opentelemetry.io/blog/2025/otel-arrow-phase-2/
90•tanelpoder•14h ago•16 comments

I learned Snobol and then wrote a toy Forth

https://ratfactor.com/snobol/
130•ingve•3d ago•34 comments

The recently lost file upload feature in the Nextcloud app for Android

https://nextcloud.com/blog/nextcloud-android-file-upload-issue-google/
4•morsch•2h ago•0 comments

A tool to verify estimates, II: a flexible proof assistant

https://terrytao.wordpress.com/2025/05/09/a-tool-to-verify-estimates-ii-a-flexible-proof-assistant/
44•jjgreen•3d ago•0 comments

The great displacement is already well underway?

https://shawnfromportland.substack.com/p/the-great-displacement-is-already
341•JSLegendDev•1d ago•345 comments
Open in hackernews

Bus stops here: Shanghai lets riders design their own routes

https://www.sixthtone.com/news/1017072
196•anigbrowl•3h ago

Comments

ketzo•3h ago
This is really brilliant — like desire paths, but for transit. Obviously execution will be challenging, but the concept is fantastic, and China/Shanghai seems like one of the few places with the requisite density & state capacity to actually make this work.

Generally I think that the design of public spaces has SO MUCH room to be improved by just responding to the wisdom of the crowd.

amelius•1h ago
It sounds great, but if this idea is a result of cost-cutting then it might not be so great in reality.
softgrow•3h ago
I'm glad that Shanghai has moved to the next level in public transportation in meeting customer demand. Most cities don't have the funds to buy smallish buses and labour available as drivers. They don't have the money or willpower to get frequencies to turn up and go levels (ie frequent) and leave people with long walks to widely spaced routes.
cryptoz•3h ago
The actual money can’t be the issue. It’s $136 for failure to stop at a stop sign in WA. If they enforced that for 30 seconds per day the cities would be wealthy beyond belief.

Or maybe not-but we’d have much safer traffic! Thus enabling revenue from fewer deaths.

But I digress- the problem with “revenue” for cities is they actively avoid getting it. If they actually wanted or desired more funds for the city, simply enforcing laws is all that is needed. It’s just not desired to have revenue I suppose, if it means enforcing laws and collecting dues owed.

Yes yes I’m probably being “unrealistic” but honestly? Maybe not.

moooo99•3h ago
Law enforcement should not be a primary mean of funding for anything, as this creates a plethora of perverse incentives for lawmakers.

That does not mean law enforcement is bad or unnecessary. It just means that law enforcements primary purpose should be to keep people safe and educate, not to fund the districts

mulmen•1h ago
Fines are a disincentive. If they work what happens to your funding?
lan321•1h ago
TBH if I suddenly notice a massive change in stop sign or speed enforcement, to me, it'd be more of a signal of revenue gathering than safety. It somewhat undermines my opinion of police since I start seeing them more as a money making tool of the bossman.. I really couldn't care less if someone's speeding a bit or rolling stop signs as long as they are actually paying attention. For all I care you can even run red lights as long as no one is coming..
parpfish•3h ago
Tangent:

I’ve often thought that it would be great to let people design their own political districts to reduce gerrymandering

At the polling place you’d get a map with your census tract and then be asked “which two or three adjacent tracts are most similar to your community”. Eventually you’d end up with some sort of gram matrix for tract-to-tract affinity, and then you could apply some algorithmic segmentation.

Two problems:

- this is far too complex for most voters to understand, much less trust, what’s happening

- the fact it’s “algorithmic” would give a sheen of pseudo objectivity, but the selection of the actual algorithm would still allow political infouence over boundaries

permo-w•3h ago
surely then the census tracts would just become the new thing to gerrymander
abdullahkhalids•3h ago
Gerrymandering is much more favorable in a FPTP system of elections than other types of elections. Winner takes all really incentives doing whatever it takes to keep winning.

Instead of your quite complex idea of segmentation, entities should simply move to a slightly more complex election system than FPTP, but which has reduced incentive for gerrymandering. For example, systems that give parties some seats based on the percentage of votes they get in the whole country/province etc.

abdullahkhalids•2h ago
Comment 2: I have actually had the same idea as you in a slightly different context. My country is in urgent need of creating new smaller provinces by dividing the existing ones. But there is wide disagreement on what the boundaries should be.

One method would be to decide the capitals of the new provinces, and then ask people in each district which province they would most like to join. If there is contiguous land to the winning provincial capital for every district, then the solution just pops out.

agumonkey•2h ago
I also wonder if it would be stable enough over time
viraptor•2h ago
> which two or three adjacent tracts are most similar to your community

From gerrymandering to gentrifying in one easy step ;)

There are good reasons to force some mixing or suddenly your area only caters to the rich people while the non-similar area is known for making all the hard decisions for all the problems.

kr2•3h ago
Chiming in from Los Angeles, USA to say wow, must be nice living in a modern society that prioritizes public transit and peoples' ease of movement. I know, I know, it comes with trade offs of living in an authoritarian state, but the absolute abysmal state of infrastructure in this country is maddening. Ever been on a train in Denmark or Japan or Switzerland?
wonnage•3h ago
Seems like the form of government doesn't really matter, you can find examples from literally any end of the spectrum of better public infrastructure
petesergeant•3h ago
Suffrage is at the top of the hierarchy of needs, with decent infrastructure, decent wages, and public safety being much more fundamental needs for many people. There’s a reason that so many Filipinos, Indians, and Pakistanis choose to work in the Gulf.
GrqP•3h ago
Thank gawd for self driving cars…
sidibe•2h ago
I hope the end state of self driving will be buses or vans doing on demand routing like Uber Pool is supposed to be but on a larger scale and maybe with fewer points for pickup and drop off.
riffraff•2h ago
When I took an operations research class our teacher mentioned they had done a study on Rome's traffic and the best solution (optimizing for travel time etc) was mini-buses (~20 people) serving shorter routes.

Alas, nothing came of that study, and traffic in Rome has not improved in the incurring ~30 years.

dgellow•1h ago
https://www.moia.io/de-DE/mitfahren/standorte
sampton•3h ago
I don’t know. This check and balance thing is not exactly working out here.
jmcgough•3h ago
Truly the worst of both worlds that we now have authoritarianism without good public transit.
chvid•2h ago
I don’t see what this has to do with authoritarianism. If anything it is an example of the opposite.
sandworm101•2h ago
Authoritarian regimes traditionally touted public transit. From "he made the trains run on time", the German autobahn (which actually predated a certain party) to the lavish halls of the Soviet subway stations, to China's highspeed rail networks, public transit is just a thing that strongmen like to do. And absolute power certainly helps when you want to plow a road/rail/bridge through a neighborhood.

I watched an in-flight documentary about the architecture of soviet rural bus stops. Each one of them looked like it cost most than the neighborhoods they serviced.

chvid•2h ago
I just find this crazy - you can have good public infrastructure without be authoritarian.
grumpy-de-sre•2h ago
But you cannot have good public infrastructure without a strong state (strength on its own isn't authoritarianism).

A lot of western governments are rather weak, I swear baumols cost disease and spiraling social/retirement/debt spending has crippled their ability to provide for the public.

astrange•1h ago
In the US, it's mostly because the urban planning field was extremely embarrassed about "urban renewal" (rightly so) and switched to a new ideology that just completely forbids ever doing anything in case it's bad for anyone.

It's also partly because they read The Population Bomb in the 70s and literally decided to ban housing/transit in order to stop people from having kids.

dmurray•1h ago
Switzerland has a weak federal government. The cantons are smaller than US states, but have more autonomy, and a lot of matters are decided by direct democracy. Yet they still seem to have good public infrastructure.
grumpy-de-sre•1h ago
I mean the obvious is that Switzerland is rich, and money is power.

But it's true that public infrastructure is more dependent on local rather than federal governments. I think the best example of weak local governments has to be the UK [1].

1. https://www.youtube.com/watch?v=V0DKsMJl6Z8

sandworm101•2h ago
Of course. Plenty of countries do. It is not that one requires the other. It is that when authoritarians came to power in the last century, many of them initiated lavish public transport projects.
grumpy-de-sre•2h ago
Public transport is in a lot of ways an aggregate expression of state power. It takes a lot of state capabilities to be able to execute public transport well.
zorked•2h ago
Famously authoritarian Switzerland...
pastage•2h ago
"Not every authorian regime" cars are just as authorian see Gulf states. I have a hard time seeing anything less opressing than a 2 tonne hunk of steel that you need to bring along everywhere.

It is such a tiresome trope, with people gushing over cars. We do not live in 1950 anymore.

powerapple•1h ago
I guess where you come from definitely determine how you think: the bus stops look better than neighborhoods does not offend me, it actually shows collectively you can have something better than on your own, which makes a lot sense to me XD
drstewart•3h ago
No, but tell me about the trains in Canada or Australia or New Zealand instead. Curious what high speed, modern trains these nations have compared to China, or are they more backwards?
__m•2h ago
They don't have high speed trains
supertrope•2h ago
Anglosphere countries are highly car dependent.
viraptor•2h ago
This is a silly comparison. How many cities can China connect with trains vs Australia's 7 cities spread over almost 4k km in both axes... It's not as much "backwards" as requirements are vastly different. Melbourne-Canberra-Sydney could be useful and is getting started now, but I wouldn't expect more for decades.
drstewart•2h ago
China is so much more modern, progressive, and advanced than Australia
viraptor•2h ago
No idea what this has to do with this thread. And you lost me at the progressive claim...
danielbln•1h ago
Go protest against the government in both countries and see which is more progressive.
stickfigure•2h ago
Mexico City has excellent public transit without the authoritarianism.
viraptor•2h ago
So does Melbourne. (Yes you can nitpick lots of things, but overall it works and gets slowly improved)
dyauspitr•2h ago
Now we just have incompetent, horrifically corrupt authoritarians hell bent on dragging us back to oil and coal.
olalonde•2h ago
Los Angeles feels like countryside compared to Shanghai though.
kubb•2h ago
There’s a lot of excuses but in the end America can’t live in the future because of its culture.

People will say stupid stuff like "oh it’s because we pay for their defense", or "oh it’s because we have freedom", or "but but this would never work here, because we’re really different than anyone else".

But actually? It’s because we’re used to this shit and change makes us uncomfortable. We also really only care about ourselves, not our broader community.

Have you ever wondered why we have vertical gaps in public bathroom stalls? Inertia. There’s no reason to have them, but nobody cares enough to improve it. A better design isn’t more expensive or more difficult, we just don’t want it enough to make it happen.

We’re stuck in a local maximum.

jychang•2h ago
Uh, "we" ?

From someone who uses quotes „like this”?

... https://i.imgur.com/swpYbpv.png

crummy•2h ago
Maybe they're an immigrant?
mulmen•1h ago
> Have you ever wondered why we have vertical gaps in public bathroom stalls?

You mean the gap between the floor and the walls? Isn’t that for ease of cleaning?

kubb•24m ago
You mean horizontal, at the bottom of the door. That one can be justified by ease of cleaning.

I mean vertical at the side of the door. You can literally make eye contact with the occupant as you walk by.

mulmen•7m ago
[delayed]
supertrope•2h ago
>ease of movement

>authoritarian state

China has high speed rail. When you enter the train station security checks your national ID then screens your person and belongings. Buying a ticket requires scanning ID. Going from the station down to the platform requires scanning ID. On the train sometimes police come aboard and check everyone’s ID. When you get off the train you have to scan ID. Riding the bus or subway was one of the very few things that does not require scanning national ID or registering an account linked to national ID. However if you ride a bus into Beijing there are checkpoints requiring everyone to get off, get searched and show ID.

m4r1k•2h ago
On the other hand, you guys are early on in the authoritarian journey. We shall see a few years down the line if and how things get ugly.
vachina•2h ago
You seem to get quite hung up on ID
mrtksn•1h ago
AFAIK it’s the same in places with high security risks, like Turkey&Israel.

I despise this, not because I’m worried about the government but because it makes me feel restrained to act in a specific manner because this is not my space and I’m being watched. It’s dehumanizing.

In most of the Europe you feel like you own the place even if there are many rules. In Eastern Europe it’s even better, you feel free and nobody is watching you. The government and the wider system feels non-existent(which is the other end of the spectrum and can result in unmaintained infrastructure but it does have its charm).

chvid•2h ago
I have been on trains in Denmark a plenty and our public transport planning is slow and bureaucratic.

We could learn from this example - both in major cities and areas where demand is too scattered to justify regular routes.

keiferski•2h ago
I once rode the bus across LA. Years and dozens of countries later, it is still probably the single worst public transit experience I've ever had.

It wasn't because of the bus itself, or the routes, or anything like that. But because the willingness of people to tolerate one passenger screaming, threatening others, refusing to move for a handicapped woman, etc.

American public transit is a cultural problem, not an infrastructure one.

geremiiah•1h ago
Dude, I have only ever rode busses in Europe, but such incidents are bound to happen, even in the most posh areas of the continent.
keiferski•1h ago
These incidents happen on a regular basis on public transit in California, and on that trip similar things happened to me a few other times. It's not comparable to European transit systems at all.
informal007•3h ago
This remind me that road router should be walked by passenger rather than designed by designers.
ars•3h ago
Like this: https://en.wikipedia.org/wiki/Desire_path
zaptheimpaler•3h ago
China is the only modern country that has both the capability and the lack of bureaucracy to just do things like this. It's simultaneously amazing to see and a depressing reminder of how badly western societies are crippled by rules of their own making. It would take years to make a single new bus route in any city, I don't think I've ever even seen that happen.
petesergeant•3h ago
> China is the only modern country that has both the capability and the lack of bureaucracy to just do things like this

Habibi, come to the UAE or Qatar

rrr_oh_man•2h ago
Excuse my ignorance, but don't UAE/Qatar mostly use it to build malls and vanity projects? That's at least the media stereotype I have.
petesergeant•2h ago
There’s no shortage of malls in UAE, but also there’s fantastic infrastructure — great roads, a metro system, a country-wide rail system (open for cargo, opening for passengers soon). As for “vanity projects”, the Palm and both Burj’s are commercial projects that are also highly successful tourist draws. I can see an argument that the Abu Dhabi branches of the Louvre and the Guggenheim could be seen that way, but I think it’s fairer to see them as cultural investments.

I guess I see the unfinished projects as being the proof: The World and the 2nd Palm haven’t been finished because they (I assume) stopped making commercial sense to the developers.

I would finally note that Dubai specifically has little oil and gas wealth. Maybe 1% directly and 10% that comes as subsidy from AD which has plenty. The rest is literally just a combination of smart and commercially savvy governance combined with an essentially unlimited amount of desert to build in.

rrr_oh_man•1h ago
Thanks for the perspective!
HPsquared•1m ago
It sounds a bit like Singapore.
fakedang•2h ago
The Roads and Transport Authority of Dubai is by far the best government authority I have ever interacted with, worldwide.

Once I had an issue with bus routes for my father's employees (similar problem, high density route with fewer routes). I put a request on their dashboard from abroad and within days, their reply came back with them confirming a trio of new buses to cater to that route.

Another time, I had an idea for bus route planning (not related to above, that relied on a simple ping system for bus driver notification). I sent an email describing the idea in short to the Emirati CEO of the bus authority, and within 15 minutes, he acknowledged my email and connected me with his advisor to set up a meeting the next day. The advisor (an Indian with a US PhD in urban transport systems) discussed my idea through over a meeting.

Oh, and there are self-driving bus demos currently happening in Abu Dhabi right now.

rrr_oh_man•1h ago
Oh wow, that's pretty mind blowing!!! Thanks for sharing
mschuster91•1h ago
> Once I had an issue with bus routes for my father's employees (similar problem, high density route with fewer routes). I put a request on their dashboard from abroad and within days, their reply came back with them confirming a trio of new buses to cater to that route.

Well, that's what happens if you can just throw money at problems. In Germany, it would most likely get rejected because there are no spare buses/drivers or budget for the fuel, and even if there was money it would likely be delayed for at least one year because the new route would have to pass through the usual tender/bid system first.

tw1984•2h ago
> the lack of bureaucracy to just do things like this

sorry to disappoint you but Shanghai is the place where ride-sharing wasn't even allowed in its main international airport just 12 months ago. bureaucracy mixed with corruption is at shockingly bad level.

sudahtigabulan•38m ago
Some Europian countries ban ride-sharing in their entire territories, not just airports.

https://www.ncesc.com/which-european-countries-dont-have-ube...

So Shanghai seems indeed low-bureaucracy, in comparison.

presentation•38m ago
I used DiDi from Pudong to Hongqiao around 6 years ago. Was there a span in between where it was a no-go?
keiferski•2h ago
Check out Warsaw, Poland. Public transit is excellent, clean, and basically gets you anywhere via bus, tram, subway, or one of 4+ ridesharing apps. Bike lane coverage is also pretty good. It's obviously an order of magnitude smaller than Shanghai, but so are most Western cities.

Good overview of the system: https://www.youtube.com/watch?v=0Kn2tL51bBs&t=8s

grumpy-de-sre•2h ago
Warsaw really is booming, visiting from Berlin feels like stepping ten years into the future.

Lots of real (and not paper) economic growth.

keiferski•2h ago
Hah, yeah I do really like Berlin, but traveling from Warsaw to Berlin does feel like going back in time, infrastructure and mentality wise.
grumpy-de-sre•1h ago
I mean the public transport infrastructure here is great, and there's a lot to love about the place (it's why I'm still here after all).

But spot on about the mentality. A lot of that great infrastructure here was inherited, and the attitude around it's continued development has been super conservative. Not to mention the Berlin government is borderline insolvent.

Just look at the cluster fuck that was car free Friedrichstr.

Warsaw is great, need to visit Poland again, have a huge soft spot for pączki.

unwind•1h ago
ObWikipedia: pączi are a Polish filled doughnut [1] that seems awesome. Thanks.

[1]: https://en.wikipedia.org/wiki/P%C4%85czki

keiferski•1h ago
They are indeed awesome, and once a year, everyone eats donuts for Fat Thursday.

https://culture.pl/en/article/fat-thursday-polands-tastiest-...

dgellow•1h ago
> It would take years to make a single new bus route in any city, I don't think I've ever even seen that happen.

It happens all the time in Western Europe, not sure what you’re talking about

0_____0•42m ago
Might be USian bias. I've seen bus routes change in the US but not to the degree of adding massive amounts of service.
DocTomoe•1h ago
Berlin and Hamburg, both in Germany, would like a word.

These concepts have been popping up in the last few years all over the world.

The Shanghai example is special because it uses actual busses, and actual stops.

Now, demand calculation in the west is easy: Students always go from where they live to the school they are being schooled at in the morning, and return either at around 1pm or around 4pm. You don't need a fancy system to put those lines on the map: check when school ends, add 15 minutes, then have busses drive to major population centres (with smaller villages being served similarly when the bus arrives).

The elderly want to go to and from doctors, and to supermarkets. That, too, is easily manageable in the 'students at school' ofttime and follows similar patterns.

Workers are similar, especially for large workplaces. Smaller workplaces - now it gets interesting, especially when there is some movement between workers and places of business (and, as a third aspect, time).

In Shanghai, that only is possible because you have a large overlap between

1. people who ride public transit and 2. are tech-savvy enough to use the demand-calculating system. Also 3. as you are essentially making schedules to plan around obsolete, you need to provide enough service that people aren't surprise-lost in the city because the route changed randomly.

Where I live, public transit is used by students and the elderly (who don't do 'internet things' and pay for their ticket in cash, with the driver. The essential young-adult to middle-aged population doesn't use public transit, because it is too slow, too expensive, and too inflexible for their work schedules. Good luck getting the critical mass of data to design bus routes there.

gnopgnip•47m ago
Dollar vans are a lot like this and all over. They will take you where you need to go as long as it isn't too far off the "route"
citizenpaul•46m ago
In Austin tx they have 30inch eink screens at all the stops. They update with new routes and schedules regularly. I admit I don't know the flexibility or if decisions are made years in advance though.
mcintyre1994•26m ago
Cities in the UK are adding new bus routes all the time, why wouldn’t you be able to do that?
npodbielski•18m ago
How making rules crippling public transport? Obviously not everything is great in the west or here where I live but I prefer it to gutter oil or play doah buldings. China is far from perfect as well.
HPsquared•9m ago
There are pros and cons to each system, of course. But I'd expect the looser system to produce more innovation.
comrade1234•3h ago
Train/bus services change every year here in Switzerland, but based on usage data rather than voting, which seems like it could be gamed.
rrr_oh_man•2h ago
I love the Swiss approach to things. Possibly the only sane country.
chrisandchris•2h ago
Routes actually don't change that much, is mostly the schedule. The article however is more about the route and less about the schedule.
yanhangyhy•2h ago
this is great. hope beijing will adopted this soon
philberto•2h ago
The moia service in Hamburg Germany offers virtual stops which is the next step I would argue. The bus follows a different route and stops every time based on the need of current passengers

https://www.hvv-switch.de/en/faq/what-are-virtual-stops/

dgellow•2h ago
I was going to say this! Moia is pretty awesome
mattlondon•2h ago
What does that mean? The links doesn't help explain it much?

In the UK/London there are some bus routes where you just stick your arm out and the bus will stop to get you where you stand ("hail and ride") and equally you can just ring a bell when onboard and the driver stops as soon as there is somewhere convenient to let you off. The route is fixed though.

Is it that sort of thing?

mimischi•2h ago
What routes are those? I thought you can only be picked up/dropped off at designated stops
tonyedgecombe•1h ago
The route through my village is hail and ride although most of the bus drivers seem to disagree.
philberto•1h ago
So there are virtual stops all over the city. You book a ride let's say city center to your home. The service integrates this route into existing rides or create a new ride. It might stop 5 times on the way to your home and pick up people and drop them. And you as a passenger won't know the route in advance. And it will not be the fastest to your place in most cases.

I guess this is what you call "ride sharing". It is like your parents picking you up from football and realizing the kid from the other part of the town also needs a ride so they make a huge detour

geremiiah•1h ago
This is just a shared taxi, no? They have existed for a long time at small scales. For example airports and hospitals often have such services.
jillesvangurp•1h ago
I like this; it's smart. It's a low tech solution that simply coordinates transit based on demand and self optimizes to serve that demand.

The value of buses and trains running on schedule is mainly that you can plan around it. But what if transit worked like Uber. Some vehicle shows up to pick you up. It might drop you off somewhere to switch vehicles and some other vehicle shows up to do that. All the way to your destination (as opposed to a mile away from there). As long as the journey time is predictable and reasonable, people would be pretty happy with that.

throw310822•1h ago
In various countries there are private vans that ride along the normal bus routes, marked with the same numbers as the buses. They work exactly like buses, collecting and leaving people at the stops, but they're much smaller and usually more frequent. I always thought they were an excellent solution- I don't get why there shouldn't be anything in between big, rare, and shared public buses and small, on-demand, individual private cars.
grumpy-de-sre•1h ago
I'm not really aware of many rich countries that operate minibusses in urban areas. The bulk of the cost of operating public transport is labor so there's a strong incentive to scale.

Now if we get Waymo style self driving minibusses, that'd be great. But if the running costs for full size electric busses aren't too dissimilar it might just make sense to standardize on larger automated busses for increased surge capacity.

throw310822•1h ago
I'm not sure why the should "operate" anything. Any taxi or Uber driver could autonomously decide to put up a route sign and start following that route, with a standard ticket price that makes the service profitable.
grumpy-de-sre•1h ago
So the public transport authority stops running their own vehicles, and instead places tenders for individual routes? And anyone can bid on operating the route? I mean they already do that with subcontractors for contingencies etc.

Overwhelmingly however it's cheaper to vertically integrate, and private operators have no interest in taking low profitability routes (which can often be very important due to second order effects).

I will contend that automated busses might change things here a bit though.

throw310822•52m ago
> So the public transport authority stops running their own vehicles, and instead places tenders for individual routes? And anyone can bid on operating the route?

No. The public transport authority keeps doing exactly the same that it's doing now. Simply, taxi drivers can choose daily to start following a route for shared drives. Nothing else, except maybe some coordination so that the ticket price is known in advance.

mytailorisrich•35m ago
Busses cause nuisances so routes are regulated. It is also difficult to operate them at a profit. If you let the market decide freely on a per route basis most routes would disappear.
bisRepetita•44m ago
Hong Kong

https://en.wikipedia.org/wiki/Public_light_bus

vkou•40m ago
Vancouver has 20-person minibuses serving suburban routes. They are what make the rest of the transit system work.

I'm told (but have no idea of how true that is, since my social circles don't intersect it) that New York has a cottage industry of private bus-vans, that sit somewhere between a taxi and a vanpool that get people (usually working poor) to and from work.

grumpy-de-sre•15m ago
From some googling it appears a major reason for the community shuttles is that they are allowed to operate on narrower, suburban streets than full sized busses and have lower fuel consumption per mile.

I'll concede geography limits are a valid reason for smaller modes of transport.

yitianjian•27m ago
New York:

https://www.newyorker.com/business/currency/interactive-new-...

HPsquared•19m ago
Rich countries have both buses and taxis. These sit between the two in terms of both quality and price. I don't think it's a cost issue but a licensing one.
keiferski•44m ago
Example of this in ex-Soviet countries:

https://en.wikipedia.org/wiki/Marshrutka

Etheryte•36m ago
I don't think marsa, as they're called where I'm from, are the same thing as described here. At least in my home country, they serve routes that don't get enough traffic for a large bus, so they have their own numbers and routes. Usually you would get one if you're going to a small village in the countryside or similar.
keiferski•27m ago
Hmm; not sure then. I remember riding one of these in Odesa about a decade ago, from the airport to the city (presumably a route that would be busy enough to have a bus line.)
throw310822•15m ago
Well I was indeed thinking of marshrutkas, at least as a saw and used them (many) years ago.
notpushkin•1h ago
I had to do a visa-run in Vietnam a couple weeks ago and my trip to the border was exactly like that. After the bus got to their nominal final stop, they’ve unloaded all passengers except me, then made a couple other stops (they took a computer monitor from one place to another??), then finally told me to wait and take another bus, which I didn’t have to pay for. (Both buses were of the micro-bus / marshrutka kind, of course.)
thanatos519•1h ago
Yes! Just use an app to say where you want to go, and it tells you which of the 3 nearest bus stops to go to, and you get where you want to go reasonably quickly. No bus routes, just dynamic allocation and routing based on historical and up-to-the-minute demand.

If you tell the system your desire well in advance, you pay less. "I need to be at the office at 9 and home by 6 every weekday". Enough area-to-area trips allocate buses. Smaller, off-peak, or short-notice group demand brings minivans. Short-notice uncommon trips bring cars. For people with disabilities or heavy packages, random curb stops are available.

Then you remove private cars from cities entirely. Park your private car outside the city, or even better, use the bikeshare-style rentals. No taxis or Ubers, only public transit, with unionized, salaried drivers. Every vehicle on the road is moving and full of people and you can get rid of most parking spaces and shrink most parking lots.

It's not rocket science. It's computer science.

Fantasy, because it would allow us to drastically reduce the manufacturing of automobiles.

rich_sasha•1h ago
I suspect it's a pretty hard optimisation problem if you want to be lean. And if you want to overprovision... you end up with something that looks a bit like status quo.

Don't get me wrong, I'd love for this to exist. Just, as someone with optimisation experience, it seems pretty gnarly.

vidarh•55m ago
I think the cheapest and easiest starting point would be to offer people a time guarantee if they book, and contract with cab companies to provide capacity.

E.g. a bus route near where I used to live was frequent enough that you'd usually want to rely on it, but sometimes buses would be full during rush hour. Buying extra buses and hiring more drivers to cover rush hour was prohibitively expensive, but renting cars to "mop up" when on occasion buses had to pass stops would cost a tiny fraction, and could sometimes even break even (e.g. 4 London bus tickets would covered the typical price for an Uber to the local station, where the bus usually emptied out quite well)

Reliably being picked up in a most 10 minutes vs. sometimes having to wait for 20-30 makes a big difference.

HPsquared•25m ago
Even just letting people know how full the bus is, in advance, would help a lot with that decision to take a cab etc. There could easily be a map or list of the physical buses and how full they are.
vidarh•1h ago
Even with regular, fixed routes, I've for some time argued the transit operator really need booking apps, on the basis that you really need the data on the full journey, and it'd transform e.g. bus routes if you could offer "there'll be a pickup within X minutes", without necessarily having the buses for it by falling back on renting cars. If you make people give their end destination, you can also do much like what the article suggests, but semi-automatic based on where those on the bus (and waiting at stops) are actually going right now.

Today, ridership gives hard data on where people will go and when given the current availability. Offer a guaranteed pickup, and you get much closer to having data on where people actually would want to go, and even more reliably than people voting on a "wouldn't it be nice if" basis.

HPsquared•40m ago
I don't even know if my local bus company tracks when people get on and off. It'd need facial recognition to track each person getting on, and when that person got back off the bus.
dist-epoch•38m ago
This will never work in US for two reasons:

1. removes control from local authorities - "we are supposed to decide for our citizens, not them"

2. NIMBYs will oppose the bus passing on their street - "too much noise, peoples, ..."

mcny•12m ago
> NIMBYs will oppose the bus passing on their street - "too much noise, peoples, ..."

It is funny because nobody ever opposes Amazon or UPS trucks...

I think if we can get people to use a service, they won't oppose it?

noduerme•32m ago
Cool, so a dictatorial command economy mostly run by graft and bureaucratic fiat finally puts out an app to ask what people want, so it can attempt to emulate what free markets have been doing just fine for centuries. And this is heralded as a bold step into the future? Why? You might say because everyone's voice counts, rather than what they can pay, but call me a cynic - some people's voices will always be more equal than others in any system less transparent than a cash market.

India and Thailand and most of Latin America have great privately operated local transport, from city busses to pickup trucks to regular route taxis, all self-organizing without needing a centralized database to manage them. If you leave individuals mostly alone, enforce a few rules to make them play fair, and rid your government of corruption, then people will organize themselves. Centralized systems are sluggish dinosaurs. They are inevitably both corrupt and unresponsive. And the world's biggest country by population playing Uber with its busses is just another temporary way to calm people who want to innovate, as well as to track anyone who wants to travel and to target anyone who wants something that might raise a flag.

I do understand the notion in the CCP imperial court that creating social harmony is a means to secure the mandate of heaven to rule, but harmony imposed artificially is antithetical to social and economic advancement.

PicassoCTs•1h ago
Busses need a rethink. There needs to a TGV like central hub and spoke fast travel version, with large capacity. And there needs to a a "on demand, collect people to the spoke" mini-bus service. And then there is no - as in "NOOO" option, for any local politician, to make the speed-bus stop at any location else, that is not directly on route and at least 5 kms apart. And the speed bus can not be allowed to be stuck in traffic, so obviously bus lanes it is.
brador•1h ago
This has been tried in some European countries in the early 2000s, website not app.

People stop using it. Forget to cancel, unreliable service, took too long. As users drop wait times become longer, cascading failure.

Solution was real time dynamic rerouting and bus stop buttons to request the bus. But by then it was no longer wanted and canned.

dluan•50m ago
Last year Shanghai celebrated the 100th anniversary of the bus system, so they decorated all of the bus liveries to be a modern take on the historical first busses. They are very cute and easy to use, and a lot of the bus stops have little old LCD displays showing how far away the next bus is.
elric•26m ago
How does this work in practice? Say someone wants to take a bus to the hospital. But not enough people want to go to the hospital. Will the bus not run and will you be shit out of luck?
liampulles•22m ago
Here in South Africa, we have "Taxis", which are individually owned (to a degree) minibuses crammed full of people. Routes are whatever maximises earning potential for the driver, so it is a kind of bottom up solution in a sense.

It is a violent cartel, so certainly not a good thing across the board, but it's just an interesting variant.

est•20m ago
take this only as a grain of salt.

It has been tried in many cities before like Beijing, Qingdao, Dalian, Hangzhou and Chengdu.

It wasn't a bad idea, it's just a good route gradually became a fixed route.

charlieyu1•20m ago
Sounds like minibus in Hong Kong with extra steps - we have been doing this since eternity. Driver just ask where people would stop in advance, sometimes an entire area would be skipped if no one goes there