This study from MIT used geo data collected from cars in Milan, Italy, to check the effectiveness of 30 km/h zones in reducing speed.

The first conclusion is that the signs don't work: 85 percentile speeds are all over the place in 30 km/h zones in Milan, as shown in the figure below:

The second step was finding correlations between speeds and street features extracted from openstreetmap. Results are as expected: narrow, short, curvy sections correlate with lower speeds, as do 1 lane vs more, one way vs 2 ways:

The final step is also interesting: the authors made a model to predict the compliance of 30 km/h speed limit on streets that are 50 km/h at the moment. Useful for urban planning to understand if charging an area to 30 km/h would need structural interventions (like bumps, narrowing of the street...) or not:

There is so much more in the article, I suggest to read it fully.

crossposted from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114827312307353297

This study from MIT used geo data collected from cars in Milan, Italy, to check the effectiveness of 30 km/h zones in reducing speed.

The first conclusion is that the signs don't work: 85 percentile speeds are all over the place in 30 km/h zones in Milan, as shown in the figure below:

The second step was finding correlations between speeds and street features extracted from openstreetmap. Results are as expected: narrow, short, curvy sections correlate with lower speeds, as do 1 lane vs more, one way vs 2 ways:

The final step is also interesting: the authors made a model to predict the compliance of 30 km/h speed limit on streets that are 50 km/h at the moment. Useful for urban planning to understand if charging an area to 30 km/h would need structural interventions (like bumps, narrowing of the street...) or not:

There is so much more in the article, I suggest to read it fully.

crossposted from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114827312307353297

Premise

FIAB Segrateciclabile is a local association, promoting cycling as a mean of transport, part of a national FIAB association. What follows is the translation of an Italian post where we share with members of the association why we opened an account on Mastodon (we already have Facebook an IG). I though it would be interesting to share in thos space, since I think this kind of associations should all be on the fediverse, as their values usually align much better than those of X, Facebook etc.

Why FIAB SegrateCiclabile opened an account on Mastodon

FIAB SegrateCiclabile recently opened an account on Mastodon @FIABSegrateCiclabile@mastodon.uno where we share events and news from our FIAB Ciclobby section.

What is Mastodon ?

Mastodon is a social network similar to Twitter, but with different principles. Users only see posts from those who follow, in chronological order, without ads. Unlike Twitter or Facebook, Mastodon is part of a larger network (called Fediverse) composed of many connected servers (called instances). Anyone can open one and be part of it, creating a decentralized environment. This means that no one can control everything, as it does with the big platforms.

What does Mastodon have in common with sustainable mobility?

Mastodon and the Fediverse share values with cycling and sustainable mobility, as they arise from grassroots with the aim of solving the structural problems of mainstream solutions.

Freedom and Inclusion

Unlike traditional social media, Mastodon does not require personal data to access content. It promotes an inclusive environment, where hate speech is not tolerated. FIAB is committed to a mobility accessible to all, not only to those who own a car, a driver’s license and the ability and the economic possibility of using it.

Community and Participation

Those who ride a bicycle have a deeper connection with their surroundings. The car isolates, while the bike favors genuine interactions. In the Fediverse, users can connect authentically, with no algorithms that manipulate their choices.

Democracy of the Spaces

The Fediverse represents a reaction to the commercialization of the Internet, giving control back to users. Likewise, FIAB fights to give public space back to people, not cars.

Conclusion

In an era dominated by large corporations, it is essential to enhance digital spaces like Mastodon. These instruments promote freedom of expression, inclusion and democracy, reflecting FIAB. We invite everyone to explore Mastodon and join a community that values genuine connections.

Freedom and democracy must exist in both physical and digital spaces.

Head to the link to see the pictures of this literally green building

EDIT: changed article link and title to comply with rules (that I didn't read 😛). The article that is linked now, links to the previous one (this one https://www.rbb24.de/politik/beitrag/2025/06/senatsverwaltung-verkehr-berlin-tempo-30.htm), and the title is the google translated of the new article, as close as original German as I can

The absurdity of the proposal is already in the title, and shows how motonormativity is spread all over the world.

Berlin has a very good public transit system, and a few 30 km/h zones cannot be that bad.

I would love to hear opinions from someone who lives there!

crossposted from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114732266280428499

The absurdity of the proposal is already in the title, and shows how motonormativity is spread all over the world.

Berlin has a very good public transit system, and a few 30 km/h zones cannot be that bad.

I would love to hear opinions from someone who lives there!

crossposted from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114732266280428499

Doesn't sound like much, but waiting for a bus on a bench can make a huge difference.

Guerrilla urbanism is awesome!

30 associations are proposing to the European Commission to impose a limit on the size of new cars, in particular the total width and bonnet.

A report connected with this request showed that the average bonnet height of newly-sold cars in Europe is increasing by 0.5 cm a year.

Many studies showed that bigger cars and higher bonnets are related to more collisions, and worse outcome for pedestrians and cyclists (and those in smaller cars), especially in regards to children

Those SUVs are kid crushers, they shouldn’ be on our roads

crossposed from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114674420551539891

30 associations are proposing to the European Commission to impose a limit on the size of new cars, in particular the total width and bonnet.

A report connected with this request showed that the average bonnet height of newly-sold cars in Europe is increasing by 0.5 cm a year.

Many studies showed that bigger cars and higher bonnets are related to more collisions, and worse outcome for pedestrians and cyclists (and those in smaller cars), especially in regards to children

Those SUVs are kid crushers, they shouldn' be on our roads

crossposed from: https://mastodon.uno/users/rivoluzioneurbanamobilita/statuses/114674420551539891

I took a strawberry seedling and poured it into a larger pot.

The central part is fine, and some strawberries are growing. But some parts are dying, drying from the base, as you can see in the pic.

I was wondering if it is like basil, where the plants you buy are made of many different plants too close, so it is better to separate them? Or, is there is something else I’m doing wrong?

Do you have any advice?

crossposted from: https://urbanists.social/users/lgsp/statuses/114626799946985779

Becky Guy, who lives on Whittlesey Road on the B1040 near Thorney, Peterborough, said over the past five years about 10 cars have crashed into her garden or her neighbour's.

Cross-postes from: https://feddit.uk/post/30451424

I found the aeticle in a post on the fediverse, and I can't find it anymore.

The reaserchers asked a simple mathematical question to an LLM ( like 7+4) and then could see how internally it worked by finding similar paths, but nothing like performing mathematical reasoning, even if the final answer was correct.

Then they asked the LLM to explain how it found the result, what was it's internal reasoning. The answer was detailed step by step mathematical logic, like a human explaining how to perform an addition.

This showed 2 things:

• LLM don't "know" how they work

• the second answer was a rephrasing of original text used for training that explain how math works, so LLM just used that as an explanation

I think it was a very interesting an meaningful analysis

Can anyone help me find this?

EDIT: thanks to @theunknownmuncher @lemmy.world https://www.anthropic.com/research/tracing-thoughts-language-model its this one

EDIT2: I'm aware LLM dont "know" anything and don't reason, and it's exactly why I wanted to find the article. Some more details here: https://feddit.it/post/18191686/13815095