Søren Have
@sorenhave.dk
Mobility and Infrastructure Lead at green think tank CONCITO.
Living in Frederiksberg, Denmark.
M.Sc. & PhD (math).
Follow me if you are into climate action, transport/mobility and related areas. Here I write mostly in English, but occasionally in Danish.
Living in Frederiksberg, Denmark.
M.Sc. & PhD (math).
Follow me if you are into climate action, transport/mobility and related areas. Here I write mostly in English, but occasionally in Danish.
Reposted by Søren Have
January 10, 2026 at 2:53 PM
Reposted by Søren Have
When a cycling city has a walkability problem, there’s probably too much curb parking for cars.
January 10, 2026 at 1:25 PM
When a cycling city has a walkability problem, there’s probably too much curb parking for cars.
Reposted by Søren Have
Sorry, but triumphant claims about autonomous vehicle safety are wildly exaggerated.
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
We Still Don’t Know if Robotaxis Are Safer Than Human Drivers
And even if self-driving technology proves to be less dangerous, there are many better ways to improve traffic safety and prevent fatal crashes.
www.bloomberg.com
January 6, 2026 at 2:54 PM
Sorry, but triumphant claims about autonomous vehicle safety are wildly exaggerated.
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
Reposted by Søren Have
Look at all these empty car lanes! They should get rid of them to build more bike lanes
Still work to do though. I regularly pass here on my walk to work, and have noted that now not all cyclists make it through in one green light cycle.
Time to reallocate even more space.
Video from a morning rush hour last summer.
Time to reallocate even more space.
Video from a morning rush hour last summer.
January 7, 2026 at 2:44 PM
Look at all these empty car lanes! They should get rid of them to build more bike lanes
Reposted by Søren Have
#OTD 80 years ago: the First Session of the United Nations General Assembly
media.un.org/photo/en/ass...
media.un.org/photo/en/ass...
January 10, 2026 at 8:47 AM
#OTD 80 years ago: the First Session of the United Nations General Assembly
media.un.org/photo/en/ass...
media.un.org/photo/en/ass...
Reposted by Søren Have
Dear Waymo,
We want you to succeed. But as former NYC Mayor Bloomberg said, "Trust in God. For everything else, bring me data."
We believe AVs will someday make urban streets safer.
Trust requires you share comparable data that scooters, buses and trains provide to cities. Will you?
Love, Jeff
We want you to succeed. But as former NYC Mayor Bloomberg said, "Trust in God. For everything else, bring me data."
We believe AVs will someday make urban streets safer.
Trust requires you share comparable data that scooters, buses and trains provide to cities. Will you?
Love, Jeff
A judge scolded Waymo during an administrative rules proceeding, after the company refused to disclose how many of its robotaxis had stalled during a power outage in San Francisco.
Waymo scolded by judge after robotaxi company refuses to discuss details from power outage
A judge scolded Waymo during an administrative rules proceeding, after the company refused to disclose how many of its robotaxis had stalled during a power outage in San Francisco.
bit.ly
January 10, 2026 at 1:56 AM
Dear Waymo,
We want you to succeed. But as former NYC Mayor Bloomberg said, "Trust in God. For everything else, bring me data."
We believe AVs will someday make urban streets safer.
Trust requires you share comparable data that scooters, buses and trains provide to cities. Will you?
Love, Jeff
We want you to succeed. But as former NYC Mayor Bloomberg said, "Trust in God. For everything else, bring me data."
We believe AVs will someday make urban streets safer.
Trust requires you share comparable data that scooters, buses and trains provide to cities. Will you?
Love, Jeff
Reposted by Søren Have
This is a pretty cool graphic from Ember, showing the percentage of new car sales that are electric in different countries.
Reducing the overall number of cars (& their size) is essential, but if they do exist they should be electric. We're well on the way! 🎉
ember-energy.org/latest-insig...
Reducing the overall number of cars (& their size) is essential, but if they do exist they should be electric. We're well on the way! 🎉
ember-energy.org/latest-insig...
January 9, 2026 at 8:56 PM
This is a pretty cool graphic from Ember, showing the percentage of new car sales that are electric in different countries.
Reducing the overall number of cars (& their size) is essential, but if they do exist they should be electric. We're well on the way! 🎉
ember-energy.org/latest-insig...
Reducing the overall number of cars (& their size) is essential, but if they do exist they should be electric. We're well on the way! 🎉
ember-energy.org/latest-insig...
Reposted by Søren Have
The city administration of Copenhagen will no longer be posting on X.
Københavns Kommune dropper X | Nyheder | DR
Københavns Kommune er nu helt ude af det sociale medie X.
www.dr.dk
January 9, 2026 at 8:56 AM
The city administration of Copenhagen will no longer be posting on X.
Reposted by Søren Have
EU countries must dig deeper into their air-defence stocks and deliver now. We must also further raise the cost of this war for Moscow, including through tougher sanctions. (3/3)
January 9, 2026 at 10:34 AM
EU countries must dig deeper into their air-defence stocks and deliver now. We must also further raise the cost of this war for Moscow, including through tougher sanctions. (3/3)
Reposted by Søren Have
There is reason to believe that Denmark soon will decide to implement universal road pricing.
Read here why and how: concito.dk/en/concito-b...
#dktrp #dkgreen #dkpol
Read here why and how: concito.dk/en/concito-b...
#dktrp #dkgreen #dkpol
The (Danish) case for general road pricing
Paying to drive, dependent on where and when, provides both revenue for road maintenance and a cost-efficient way to handle road congestion. Yet, it is a politically hard decision to introduce such a ...
concito.dk
January 9, 2026 at 2:02 PM
There is reason to believe that Denmark soon will decide to implement universal road pricing.
Read here why and how: concito.dk/en/concito-b...
#dktrp #dkgreen #dkpol
Read here why and how: concito.dk/en/concito-b...
#dktrp #dkgreen #dkpol
Reposted by Søren Have
The US stands alone in dismissing the problem of climate change.
January 8, 2026 at 11:24 PM
The US stands alone in dismissing the problem of climate change.
Reposted by Søren Have
Cities need to design themselves so that people have options in mobility. Rather than thinking of bicycles as children's toys, imagine them set-up to be massive money savers that also boost your mental and physical health during the commute.
Still work to do though. I regularly pass here on my walk to work, and have noted that now not all cyclists make it through in one green light cycle.
Time to reallocate even more space.
Video from a morning rush hour last summer.
Time to reallocate even more space.
Video from a morning rush hour last summer.
January 7, 2026 at 3:55 PM
Cities need to design themselves so that people have options in mobility. Rather than thinking of bicycles as children's toys, imagine them set-up to be massive money savers that also boost your mental and physical health during the commute.
Reposted by Søren Have
Reject all claims that either government or the private sector is intrinsically more competent.
Both can be run well or badly. Both have ways of rewarding either competence or incompetence.
Focus on the people in charge, and their incentives.
Both can be run well or badly. Both have ways of rewarding either competence or incompetence.
Focus on the people in charge, and their incentives.
January 8, 2026 at 9:50 PM
Reject all claims that either government or the private sector is intrinsically more competent.
Both can be run well or badly. Both have ways of rewarding either competence or incompetence.
Focus on the people in charge, and their incentives.
Both can be run well or badly. Both have ways of rewarding either competence or incompetence.
Focus on the people in charge, and their incentives.
Reposted by Søren Have
In its home market Germany 🇩🇪 , the Volkswagen ID.3 is now cheaper to buy than the Golf (€29,330 vs €29,365).
Lower operating costs and more features. Is the nostalgia of a generation holding back the breakthrough?
Lower operating costs and more features. Is the nostalgia of a generation holding back the breakthrough?
VW bietet bis zu 5.000 Euro „ID.-Kaufprämie“ - electrive.net
Volkswagen hat mit der „ID.-Kaufprämie“ eine neue Rabattaktion für seine Elektromodelle in Deutschland aufgelegt. Beim ID.3, ID.4 und ID.5 gibt es 4.000 Euro
www.electrive.net
January 8, 2026 at 7:45 PM
In its home market Germany 🇩🇪 , the Volkswagen ID.3 is now cheaper to buy than the Golf (€29,330 vs €29,365).
Lower operating costs and more features. Is the nostalgia of a generation holding back the breakthrough?
Lower operating costs and more features. Is the nostalgia of a generation holding back the breakthrough?
Reposted by Søren Have
Child seat in front of the bike, Amsterdam, Netherlands, 1925.
January 8, 2026 at 3:52 PM
Child seat in front of the bike, Amsterdam, Netherlands, 1925.
Reposted by Søren Have
I’ve received a ton of feedback about this article, including some pushback.
Here’s a quick 🧵 where I’ll address a few common criticisms.
Here’s a quick 🧵 where I’ll address a few common criticisms.
Sorry, but triumphant claims about autonomous vehicle safety are wildly exaggerated.
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
It's an open question whether today’s self-driving cars are any safer than those driven by humans.
And if reducing crashes is the goal, that isn’t even the right question.
My deep dive, in Bloomberg 🧵
We Still Don’t Know if Robotaxis Are Safer Than Human Drivers
And even if self-driving technology proves to be less dangerous, there are many better ways to improve traffic safety and prevent fatal crashes.
www.bloomberg.com
January 8, 2026 at 2:22 PM
I’ve received a ton of feedback about this article, including some pushback.
Here’s a quick 🧵 where I’ll address a few common criticisms.
Here’s a quick 🧵 where I’ll address a few common criticisms.
Reposted by Søren Have
Bluesky community! This is my official NYC mayor account. I’ll be posting updates on what’s happening at City Hall and how we’re delivering for New Yorkers. It’s great to be here.
January 8, 2026 at 1:37 PM
Bluesky community! This is my official NYC mayor account. I’ll be posting updates on what’s happening at City Hall and how we’re delivering for New Yorkers. It’s great to be here.
Reposted by Søren Have
The UNFCCC underpins global climate action. It brings countries together to support climate action, reduce emissions, adapt to climate change, and track progress. The decision by the world’s largest economy and second-largest emitter to retreat from it is regrettable and unfortunate.
January 8, 2026 at 7:59 AM
The UNFCCC underpins global climate action. It brings countries together to support climate action, reduce emissions, adapt to climate change, and track progress. The decision by the world’s largest economy and second-largest emitter to retreat from it is regrettable and unfortunate.
Reposted by Søren Have
We will unequivocally continue to support international climate research, as the foundation of our understanding and work. We will also continue to work on international climate cooperation. And at home, we will continue to pursue our agenda of climate action, competitiveness, and independence.
January 8, 2026 at 7:59 AM
We will unequivocally continue to support international climate research, as the foundation of our understanding and work. We will also continue to work on international climate cooperation. And at home, we will continue to pursue our agenda of climate action, competitiveness, and independence.
Reposted by Søren Have
🌍 SLOCAT enters the new year with new leadership
As we begin 2026, SLOCAT wish our community a year filled with collaboration and impact, as we continue accelerating the transformation of transport systems towards inclusive, healthy, green and resilient solutions for people and the planet.
As we begin 2026, SLOCAT wish our community a year filled with collaboration and impact, as we continue accelerating the transformation of transport systems towards inclusive, healthy, green and resilient solutions for people and the planet.
January 8, 2026 at 7:30 AM
🌍 SLOCAT enters the new year with new leadership
As we begin 2026, SLOCAT wish our community a year filled with collaboration and impact, as we continue accelerating the transformation of transport systems towards inclusive, healthy, green and resilient solutions for people and the planet.
As we begin 2026, SLOCAT wish our community a year filled with collaboration and impact, as we continue accelerating the transformation of transport systems towards inclusive, healthy, green and resilient solutions for people and the planet.
Reposted by Søren Have
Today on Volts: NYC's congestion pricing program has been running for a year & the data is in. Results are almost entirely positive, with traffic speeds & pedestrian traffic both increased inside the zone & no surge of traffic outside it. I talk with an expert about the good news & what's next.
NYC's congestion pricing has been running for a year now. How's it doing?
Kate Slevin joins me to break down the almost unqualified success of the controversial program's first year.
www.volts.wtf
January 7, 2026 at 6:53 PM
Today on Volts: NYC's congestion pricing program has been running for a year & the data is in. Results are almost entirely positive, with traffic speeds & pedestrian traffic both increased inside the zone & no surge of traffic outside it. I talk with an expert about the good news & what's next.
Reposted by Søren Have
Listening to a press conference:
"That's when the shooting happened"
"Then the car drove off"
"Then the car sped up and the crash happened"
Grateful there were apparently no people involved in these horrible events.
Sarcasm because it is less full of expletives than what I actually think.
"That's when the shooting happened"
"Then the car drove off"
"Then the car sped up and the crash happened"
Grateful there were apparently no people involved in these horrible events.
Sarcasm because it is less full of expletives than what I actually think.
January 7, 2026 at 11:14 PM
Listening to a press conference:
"That's when the shooting happened"
"Then the car drove off"
"Then the car sped up and the crash happened"
Grateful there were apparently no people involved in these horrible events.
Sarcasm because it is less full of expletives than what I actually think.
"That's when the shooting happened"
"Then the car drove off"
"Then the car sped up and the crash happened"
Grateful there were apparently no people involved in these horrible events.
Sarcasm because it is less full of expletives than what I actually think.
Reposted by Søren Have
Instagram influencer wants a powder room so they build an entire new house. The new one ““has five bedrooms and four bathrooms. He named it Powder Haus because it had a powder room off the living room. ”
It really is time for a big honking carbon tax or wealth tax or I dont know what
It really is time for a big honking carbon tax or wealth tax or I dont know what
January 7, 2026 at 9:25 PM
Instagram influencer wants a powder room so they build an entire new house. The new one ““has five bedrooms and four bathrooms. He named it Powder Haus because it had a powder room off the living room. ”
It really is time for a big honking carbon tax or wealth tax or I dont know what
It really is time for a big honking carbon tax or wealth tax or I dont know what
Reposted by Søren Have
🚨JOB JOB JOB JOB🚨
COME BE THE SENIOR COMMUNICATIONS DIRECTOR FOR THE BEST TEAM WORKING IN CLIMATE POLITICS AND POLICY @climatecabinet.org @clicabedu.bsky.social
COME BE THE SENIOR COMMUNICATIONS DIRECTOR FOR THE BEST TEAM WORKING IN CLIMATE POLITICS AND POLICY @climatecabinet.org @clicabedu.bsky.social
Senior Communications Director
Chicago, Illinois, United States
job-boards.greenhouse.io
January 7, 2026 at 6:48 PM
🚨JOB JOB JOB JOB🚨
COME BE THE SENIOR COMMUNICATIONS DIRECTOR FOR THE BEST TEAM WORKING IN CLIMATE POLITICS AND POLICY @climatecabinet.org @clicabedu.bsky.social
COME BE THE SENIOR COMMUNICATIONS DIRECTOR FOR THE BEST TEAM WORKING IN CLIMATE POLITICS AND POLICY @climatecabinet.org @clicabedu.bsky.social
Reposted by Søren Have
And looking ahead to 2026, here are some of the climate court cases to watch
Including @greenpeace.nl's case with people from Bonaire against the Netherlands for lack of adequate climate targets and an adaptation plan – judgment due on 28 January
Including @greenpeace.nl's case with people from Bonaire against the Netherlands for lack of adequate climate targets and an adaptation plan – judgment due on 28 January
Ten climate litigation moments to look out for in 2026
1. Netherlands: Will court rule in favour of Bonaire islanders?
A group of Bonaire islanders, together with Greenpeace Nederland, filed a lawsuit against the Netherlands in early 2024, asking a court...
www.the-wave.net
January 7, 2026 at 11:05 AM
And looking ahead to 2026, here are some of the climate court cases to watch
Including @greenpeace.nl's case with people from Bonaire against the Netherlands for lack of adequate climate targets and an adaptation plan – judgment due on 28 January
Including @greenpeace.nl's case with people from Bonaire against the Netherlands for lack of adequate climate targets and an adaptation plan – judgment due on 28 January