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Søren Have

@sorenhave.dk

3.4K followers 480 following 2.2K posts

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.

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Søren Have @sorenhave.dk · Mar 13

‘Breaking up [with transport infrastructure] is hard to do’ 🎶

But at CONCITO we’re trying to show the path, much inspired by the work of in Wales.

Read our recommendations in this new brief. #dktrp #dkgreen #dkpol concito.dk/en/concito-b...

How do we get mobility that creates more value than it destroys?

Mobility is the potential for movement. That the road is clear if I want to drive. That there is a bus or other public transport running on schedule. That there are safe sidewalks and bike lanes.

concito.dk

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David Wallace-Wells @dwallacewells.bsky.social · 4h

“The earth has reached its first catastrophic tipping point linked to greenhouse gas emissions, with warm water coral reefs now facing a long-term decline and risking the livelihoods of hundreds of millions of people, according to a new report.” www.theguardian.com/environment/...

Planet’s first catastrophic climate tipping point reached, report says, with coral reefs facing ‘widespread dieback’

Unless global heating is reduced to 1.2C ‘as fast as possible’, warm water coral reefs will not remain ‘at any meaningful scale’, a report by 160 scientists from 23 countries warns

www.theguardian.com

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Kate Mackenzie @katemac.bsky.social · 1h

Cool chart, turns out that “when the sun doesn’t shine” not so important already in California

Cool graphic of California elec supply (and storage charging) over 24-hour periods. Solar supplies majority during daylight but storage then provides a sizeable chunk for first few hours of evening.

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Søren Have @sorenhave.dk · 1h

Saying this without scorn or anything: It is perhaps a consequence of more great things in life are happening to people over here, than over there.

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Streetsblog NYC @nyc.streetsblog.org · 18h

If he gets elected mayor, Mamdani’s support for banning parking near intersections citywide could undo a bureaucratic knot at the Department of Transportation, whose leaders have vigorously pushed back against the movement fighting for the safety measure.

Likely Mayor Mamdani Supports Daylighting as DOT Digs In Heels - Streetsblog New York City

The next mayor will have to overcome a deeply entrenched bureaucracy opposed to the common-sense policy.

buff.ly

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Stephen Gower @sjgower.bsky.social · 18h

I made an infographic map. Oxford's Congestion Charge scheme (from 29th Oct) is not like most congestion charge schemes, because you can get to most streets in the city without being charged. My impression is a lot of people haven't realised this.

A street map of Oxford.

Woodstock Road, Banbury Road and the streets in their immediate vicinity are coloured pink. Botley Road and streets off it are coloured green. Cowley Road, Iffley Road and Abingdon Road and streets off them are coloured blue. Streets in Marston and Headington are coloured orange. The ring road matches the colours at each junction and fades between colours as it goes around. A small area in the middle is coloured yellow, and labelled "Central Permit Area". THe Congestion Charge traffic filters are indicated by black circles circles with white segments, those white segments correspond on a 24 hour clock face with when the filter isn't operational (and the remaining black, when the filters are operational). Crosses mark other filters in the city that are enforced by ANPR but are not part of the Congestion Charge scheme.

Text at the top of the image reads "Temporary Congestion Charge for Cars in Oxford 2025-2026. Any road outside the Central Permit Area can be accessed without passing any traffic filers by using the Ring Road and selecting an approporiate exit junction (matching colours on this map)."

A key at the bottom matches the filter types, with text "Traffic Filters. Hollow Way & Marston Ferry Road 7-9am and 3-6pm. St Cross Road, Hythe Bridge Street, Thames Street and St Clements, 7am-7pm. £5 daily permit covers all Congestion Charge filters. Free Permits available. For example for residents, business use, health and car, SEND and disabilty. Congestion Charge permits do not apply for other filters, such as High Street or in East Oxford/Cowley."

Small print reads "Full details at https://www.oxfordshire.gov.uk/transport-and-travel" and "©@sjgower Contains OpenStreetMap data © OpenStreetMap contributors. Locations of highway filters are approximate and for overview purposes only. v1.3"

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Jeffrey Tumlin 🏳️‍🌈 🌁 @jeffreytumlin.bsky.social · 10h

This is a great explainer of Calif SB 79, @scottwiener.bsky.social's landmark bill to legalize housing around transit

M. Nolan Gray 🥑 @mnolangray.bsky.social · 11h

By popular demand, @aceckhouse.bsky.social and I have put together a deep-in-the-weeds explainer on SB 79. Enjoy!
substack.com/home/post/p-...

Everything You Need To Know About SB 79

…but were too afraid to read about in the actual bill.

substack.com

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Giulio Mattioli @giuliomattioli.bsky.social · 22d

This is an absolutely brilliant paper that I can only recommend to all those interested in transport poverty/equity but also in sustainable transport/climate, and on how to reconcile the two.

I can only hope that it will have the impact it deserve
doi.org/10.1016/j.er...

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Søren Have @sorenhave.dk · 13h

😱

bsky.app/profile/sore...

Søren Have @sorenhave.dk · 6d

Interesting that the discussion continues. Are people not aware of the below, or do they just pretend not to be?

Triangle illustrating the difficulty in everybody wanting parking that is cheap, vacant and nearby.

Reposted by Søren Have

Tony Jordan @tonyjordan.bsky.social · 13h

In honor of spooky month, share a 4 word horror story that only someone in your profession would understand:

Plenty of free parking.

Natasha Simonova @philistella.bsky.social · 15h

In honor of spooky month, share a 4 word horror story that only someone in your profession would understand:

New library catalogue website.

🏰meg⚔️ @Birthright Audiobook! @impavid.us · 3d

In honor of spooky month, share a 4 word horror story that only someone in your profession would understand

I'll go first: Six page commercial lease.

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David Zipper @davidzipper.bsky.social · 14h

This is good news.

A few vehicles with Intelligent Speed Assist can have an outsized impact on safety bc they’ll also prevent vehicles behind them from speeding.

www.nyc.gov/site/dcas/ne...

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Tara Goddard, PhD @drtaragoddard.com · 1d

everyone always likes to blame parking. same as it ever was.

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Søren Have @sorenhave.dk · 14h

Home from a performance of Mozart’s Requiem.

Lacrimosa is just 😭😭

Søren Have @sorenhave.dk · 14h

Hmm er det meste IT drift & support ikke offshored? Det kan man jo ikke med drift af veje og baner.

Søren Have @sorenhave.dk · 17h

Præcis. Mange organisationers selvforståelse er at de laver 1) projekter og 2) drift. Taler for at konsolidere (på tværs af mobilitetsformer).

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Søren Have @sorenhave.dk · 17h

Som rapporten også slutter med at anbefale at fokusere mere på, så er der jo masser af asfaltarbejde med at vedligeholde alle de veje som allerede er anlagt 🤷🏻‍♂️

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Søren Have @sorenhave.dk · 17h

Law of diminishing returns, road infrastructure edition.

Cadeau to the Norwegian Finance Ministry for commissioning this type of analysis. We should do the same in Denmark.

(Blue = investments; orange = net benefits)

#dktrp #dkpol #dkøko

Graph of bn NOK road infrastructure investments over time, versus the net benefits

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Zohran Kwame Mamdani @zohrankmamdani.bsky.social · 1d

It’s pronounced cyclist.

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Søren Have @sorenhave.dk · 1d

Exactly. Probably online shopping and home delivery of food are more to blame.

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Søren Have @sorenhave.dk · 1d

“To constructively move the debate forward, we propose giving up the paradigmatic and polarized approach and instead embracing a multidimensional plurality of imagined growth futures.”

Yes, please! #dkøko

Jacob Hasselbalch @jhasselbalch.bsky.social · 3d

We’re stuck in a false choice between green growth and degrowth.

One promises to fix the planet by growing the economy, the other by shrinking it.

But when you look closer, neither is a coherent political project. And there’s more overlap than most debates admit.

Reimagining growth futures: Overcoming the false binary between green growth and degrowth

When imagining how a green transition can take place, the relationship between economic growth and environmental sustainability is commonly viewed in …

www.sciencedirect.com

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Søren Have @sorenhave.dk · 6d

Interesting that the discussion continues. Are people not aware of the below, or do they just pretend not to be?

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cornelban.bsky.social @cornelban.bsky.social · 6d

China is not just building clean energy faster than anyone else. It is trying to become something new.

Call it the electrostate. Still, big caveats loom, says Chris Saltmarsh in a superb @ripejournal.bsky.social article geoeconomic.substack.com/p/party-stat...

Party-State Decarbonisation

The contradictions of China's decarbonisation

geoeconomic.substack.com

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David Zipper @davidzipper.bsky.social · 1d

Deep dive into the surge in US pedestrian deaths:

"It’s not that more pedestrians are getting hit by vehicles; it’s that the ones that are getting hit are more likely to die."

"[That] seems like fairly strong evidence for the theory that the rise in large SUVs is behind the uptick in ped deaths."

Why Are So Many Pedestrians Killed by Cars in the US?

It’s unfortunately not uncommon for pedestrians to be killed by cars in the US.

www.construction-physics.com

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David Zipper @davidzipper.bsky.social · 2d

Three newly published books argue that cars are destroying society as well as the planet.

Is the world finally ready to rein in the automobile?

My essay, in @bloomberg.com (gift link below)

‘Car Brain’ Is Making the US Unhealthy and Dangerous. EVs Won’t Fix It.

A trio of new books argue that we need to confront the full range of costs that car-based living has imposed on our cities, our health and our society.

www.bloomberg.com

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Søren Have @sorenhave.dk · 1d

Retfærdigvis er JP’s leder i dag ret klar:

Søren Have @sorenhave.dk · 1d

The transition has to start somewhere, and it’s great that richer countries like Norway and Denmark have taken the first-mover costs*. Now it will spread fast, due to cost parity.

*: We bought our eGolf for 300k in 2016, with a real range of 100-150km. Now you get twice the range for half the price