Shreyas Sudhakar @shreyassudhakar.com Writing about heat pumps at heatpumped.org
Installing heat pumps at vayu.pro
Former YC founder and rocket propulsion engineer
heatpumped.org/subscribe
D Fletcher Dunham @dfdunham.bsky.social architecture, social housing, & posts about bldgs 🏢📚🌈 Los Angeles
Chris Hayes @chrislhayes.bsky.social Bronx boy. Cubs fan. Dad, husband, writer, podcaster and cable news host.
The Sirens’ Call: How Attention Became the World’s Most Endangered Resource out now.
https://sirenscallbook.com/
Nick Grant @ecominimalnick.bsky.social Energy consultant and design engineer. Specialising in Passivhaus building, archives and museums.
Teaching building physics with https://coaction.org.uk
The Good Building Book with Jon Broom - https://www.bloomsbury.com/uk/good-building-book-9781399417136/
Sharon 🪳🌹 @sharonk.bsky.social political theologian at the ministry for the future (anglican - classical social democrat)
interests: classics, history, philosophy, conflict + IR, economics/economic history, foreign policy, climate change, E. Asia
Kevin M. Kruse @kevinmkruse.bsky.social Historian: White Flight; New Suburban History; Fog of War; One Nation Under God; Fault Lines; Voter Suppression; Myth America. CAMPAIGN TRAILS: campaign-trails.ghost.io
Guillaume @gguillaume.bsky.social De Paris à Ottawa. Bikeshevik. From each according to their ability, to each according to their needs. Mastodon: @gwouigwoui@piaille.fr
Jessica de Heij @jdeheij.bsky.social 15-minute cities advocacy | Urbanism | Sustainability | 🇳🇱🇳🇿
Views are my own
📍Ōtepoti Dunedin, NZ
Henry Grabar @henrygrabar.bsky.social my next book is about why it's so hard to build. send me your thoughts!
Patrick Siegman @siegman.biz Transportation planner and economist. Founder, Siegman & Associates. Formerly Principal & Shareholder at Nelson\Nygaard. LinkedIn: https://tinyurl.com/5cekhrjh
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.
Roger Senserrich @4freedoms.es Poldavo militante, pro-naumaquias. Amante de la burocracia. Substack sobre política americana en https://4freedoms.substack.com/.
Qagggy! @qagggy.bsky.social 📍Seattle/London. Board member at Seattle Streets Alliance. Opinions amirite. Safe, sustainable, equitable, healthy cities. Dongho Chang superfan. (he/him)
Long Branch Mike (LBM) 🇨🇦 @longbranchmike.bsky.social Managing Editor of LondonReconnections.com. Open to colabs. Opinions are mine own. EN/FR (he/him/il/lui)
You know, I'm something of a foamer myself...- R Rémi Cardona @remicardona.bsky.social
Gareth Dennis @garethdennis.uk Rail engineer and writer. Hosts @railnatter.uk and @trainsatlantic.uk. HOW THE RAILWAYS WILL FIX THE FUTURE (https://bit.ly/HowTheRailways) available everywhere. He/him.
Adrián @elenoam.bsky.social Urbanista whitexican
Zack Kopplin @zackkopplin.bsky.social Investigative journalist @OCCRP.org
ZackKopplin@Protonmail.com, Zachary.Kopplin@occrp.org Signal: +1-225-715-5946 (Opinions my own)
leftpain @leftpain.bsky.social black bat society
B. A. Friedman @bafriedman.bsky.social University of Reading (UK) PhD student studying naval strategy and amphibious warfare. Author of books On Tactics and On Operations. Occasional blogger: https://bafriedman.substack.com/
Addison Del Mastro @ad-mastro.bsky.social Writing with a focus on urbanism, culture, and popular history. I write The Deleted Scenes, a daily, mostly-urbanism newsletter on Substack. a.delmastro2@gmail.com.
Яков Эздемир @yaqov.bsky.social I am Yaqov. | 🇦🇹 | 🇦🇿 | 🇨🇱 | 🏳️🌈 | Коллективный Восток
Ontario Traffic Man @ontariotrafficman.bsky.social Transportation in Ontario.
EN🇨🇦/FR🇨🇦/NL🇳🇱
He/him
youtube.com/@ontariotrafficman
Nolan Hicks @ndhapple.bsky.social Examining how we make passenger rail better (electric/modern) for NYU-Marron. Prev: NY Mag, NY Post-Metro, NYDN. Hook’em🤘. 🏳️🌈. Tips? bynolanhicks@gmail.com; Signal/WhatsApp.
Kamil Kovar @crisisstudent.bsky.social Economist paid for doing what I love by Moody's Analytics as senior euro zone economist. Student and teacher of macroeconomic and financial crises. Views my own. 
donoteat @donoteat.bsky.social i'm back bitches
podcasting @wtyppod.bsky.social
Brendan Dawe @dawe.bsky.social Your friendly neighbourhood Vancouverite
Housing abundance enthusiast. Planning & Real Estate Consultant.
Vive le Canada. Elbows Up
kate wehwalt @katewagner.wehwalt.net Unheil-bringer. lithium prince. architecture critic @thenation.com
my blogs are https://late-review.com, https://wehwalt.net and mcmansionhell.com
she/they
Guofu 류강 대™🪨 @karnesmellagio.bsky.social 🇰🇷🇰🇵🇺🇸 Well meaning psychopath.
I sometimes talk about Korea and other shit I do for a living
Methodist
Egas Moniz Bandeira ᠡᡤᠠᠰ ᠮᠣᠨᠢᠰ ᠪᠠᠨᡩ᠋ᠠᠶᠢᠷᠠ @egasmb.bsky.social Associate Professor @tohoku_univ. 曩昔 @mpilhlt.bsky.social, @SinologieFAU, @UniHeidelberg, & @ceao_uam. 東亞政法史を硏鑽し、言語学についての豆知識を多く呟いとる。'Too much in love with my primary sources.'
FitchburgLine @fitchburgline.bsky.social 
Oh The Urbanity! @ohtheurbanity.bsky.social More housing, bikes, and transit.
https://youtube.com/@ohtheurbanity
📍 Montreal, Quebec
Diego @ryukyu-hsr.bsky.social Southeast North-Rhine-Westphalia.
Blog: metrovelododo.wordpress.com
Hayden Clarkin @thetransitguy.com I like trains and walkable neighborhoods.
https://linktr.ee/thetransitguy
Christof Spieler @christofspieler.bsky.social Director of Transportation, Madison, WI; Author of “Trains, Buses, People: An Opinionated Atlas of US and Canadian Transit,” Island Press, 2021, “Transportation and the Shape of Cities,” Island Press, 2026. (he/him) PE/AICP/LEED AP (Views are my own.)
Jon Worth @jonworth.eu European, originally a Brit, became German, moved to France. Runs #CrossBorderRail project, writes a newsletter about railways. Green, lives happily without a car.
Normally stuck on a train, stuck in a village, or escaping either on a folding bicycle.
Pavel @spavel.bsky.social Raised gifted; non-practicing.
If your reply doesn't have alt text, I won't see it.
🌐 productpicnic.beehiiv.com 💼 UX Design 🟦 Sick of rectangles 🧑 he/him
Lloyd Alter @lloydalter.bsky.social Author of"The Story of Upfront Carbon," reformed architect and developer, teacher of sustainable design at Toronto Metropolitan University. https://lloydalter.substack.com
EL COPO @el-copo.bsky.social Low carbon heating engineer.
Heatgeek.
Sustainability Installer of the Year 2024.
Yorkshire/Humber Installer of the Year 22/23/24.
Frank Reif @frankreif.bsky.social Mainly here for climate stuff. Decarbonizing heating and cooling.
Building science / efficiency / retrofit / mechanical engineering etc.- C @crzwdjk.bsky.social @crzwdjk.bsky.social
David Jaša @djasa.bsky.social Brno, biking, climate, public transport, free software... Non-zero chance of frustrated shitposting.
🐘: https://cztwitter.cz/@djasa
Brno, Czechia
Faine Greenwood @faineg.bsky.social civilian drone technology and GIS/spatial data consultant, journalist and writer, monitors small drones in the Ukraine war, humanitarian-aid adjacent, always annoying online. they/them pronouns. read my newsletter: https://little-flying-robots.ghost.io
Urban Land Rent 🇸🇴🚰 @urbanlandrent.bsky.social I do housing policy stuff and it’s ruining my life. CADA, SMUD, and SOE fanboy. House Sacramento’s most annoying member.
Urban Land Rent Foundation’s official letterboxd: boxd.it/cUU0R
Sam Bloch @samkbloch.bsky.social journalist, author of SHADE: THE PROMISE OF A FORGOTTEN NATURAL RESOURCE (2025), samuel.bloch@gmail.com
AVAILABLE NOW: https://bookshop.org/p/books/shade-the-promise-of-a-forgotten-natural-resource-samuel-bloch/22014863
potatoffel @potatoffel.bsky.social good morning fellow skeeters
David Edmondson @thegreatermarin.bsky.social Urban planner, specializing in transportation, but posts a helluva lot about indigenous political cartography. aka theGreaterMarin. Find me as @OctaviusIV elsewhere, too. DC and SF.
Jack Harman @jackharman.bsky.social Infrastructure finance professional wondering why Anglosphere costs are so high
Paavo Monkkonen @elpaavo.bsky.social Housing scholar - California, Mexico, France, Hong Kong
Jeremy "Looking for Arrows" Zorek @jeremyzorek.bsky.social Fan of all things transit, Rutgers graduate, Hunter Master's of Urban Planning Student
they/he
Noam auf Gleis 13 @aufgleis13.bsky.social Verkehrsplaner (er) in Ausbildung, Nachtzugliebhaber, Streckensammler und GA-Ausnützer. Links aus voller Überzeugung. Wohnhaft in der Schweiz, aber unterwegs zuhause.
Steven Lucy @slucy.bsky.social I run a produce store, a florist, a wine shop, and mostly post about bike lanes.
📍Hyde Park, Chicago
Tobias Watzl @tobiaswatzl.bsky.social Softwareentwickler in Linz 🇦🇹
Verbringt viel zu viel Zeit in Zügen. Reisen, Mobilität, Radfahren, Technik und Museumsbahnen.
Fotografie und manchmal DJ.
Meine Posts beziehen sich grundsätzlich auf Österreich, sofern nicht anders angegeben.
Ian @woolie.meowmeow.city Visual urbanist. I like trains, buses, cities, and maps.
@750v-dc.bsky.social @750v-dc.bsky.social 
Infrastructure explained @infraexplained.bsky.social vienna, infrastructure, urban planning, yimby,🔰
Benedict @carto-graph.bsky.social fighting the long defeat | pro-abundance | law student, future barrister, linguist | 🏳️🌈
Writing at springbett.substack.com
Alfred Twu @alfredtwu.com Berkeley Rent Board Commissioner (@alfredtwu.net), California Democratic Party AAPI Caucus & CA Dem Renters Council Board, East Bay architect & commercial artist. Reblue/follow/like does not equal endorsement.
art: http://alfredtwu.com
Hiroshi Deng Luma (He/him) @networker-365.bsky.social Joined Bluesky on 16/9/2023. A Japanese railway enthusiast who also lived in the UK in the 2000s and 2010s.
An associate professor of international law and human rights at a university in Japan (though hardly talk about them).
Lewis Lehe @lewislehe.bsky.social Assoc. Prof at University of Illinois Urbana-Champaign. Traffic, transit and economics. https://lehelab.com/
Paul (parking reform) Barter @paulbarter.bsky.social Yes, a parking-policy book club IS my idea of fun. You got a problem with that?
An 🇦🇺ian in 🇸🇬 (since 2000) but a 🌏 focus.
Join Parking Reform Network!
https://www.reinventingparking.org/
America is a Pastoralpunk Dystopia @pastoralpunk.bsky.social Let's be honest here, I mostly post about trains. Well, cities too.
I currently work in the Japanese education sector but I'd rather work with trains.
I'm a proud Philly expat so expect to see lots of stuff about PA and Pennsylvania too.
David M Levinson ⁂ @transportist.org https://www.transportist.org
@transportist@mastodon.social
@transportist.mastodon.social.ap.brid.gy
Trnsprtst. Rogue Planner. Refreshingly Unromantic. So F*ing Lucid. fRSN. 2%.
Research: #Access, #TransportEconomics, #NetworkEvolution, #Traffic.
@dereksagehorn.bsky.social @dereksagehorn.bsky.social Interested in figuring out how to build better housing, transit and cities. Construction lawyer; advocate for East Bay for Everyone. Oakland.
Brian Stokle @urbanlifesigns.bsky.social Visionary pragmatist. Urbanist working for better parks and moving about. Glutton for complicated projects. Flag designer and cartographer. 🇬🇧🇫🇷🇺🇸
www.sffoggoldflag.com
Reading: The Feminine Mystique, by Betty Friedan
Paolo Beria 🇪🇺 @beriapaolo.bsky.social Associate Prof. in Transport Economics, Politecnico di Milano, Italy 🇮🇹🇪🇺. Director of TRASPOL http://traspol.polimi.it .
Traveller. Dad!
I left Twitter and I am fine here.
Dominic Stucki @dominicstucki.ch European, democrat, public transport specialist and rail nerd from Zürich, Switzerland. Writes endless rail travel threads. Job: Concepts and network design at SBB.
🦣 urbanists.social/@dominicstucki
🌐 dominicstucki.ch
Tim Knopf @lokfuehrer-tim.bsky.social @lokfuehrer_tim
Egal wie gut ihr fahrt, ich fahre Güter!
#Lokführer, #TRAINfluencer, #Betriebsrat.
#Feuerwehr Oberbrandmeister. #FCSP
Félix @felixonrails.ch Too young, too simple, sometimes naive.
https://youtube.com/@felixonrails?si=A1Tg0oIhgSfwobcD
Pride Ott 🦦 🏳️🌈🏳️⚧️ @hikoukihikouki9.bsky.social 26 | He/Him | San Diegan | Rugby, language learning, transit | Otter in the furry sense and the gay sense | Aspiring RN
Tobias Harris @tobiasharris.bsky.social Japanese politics analyst; author of The Iconoclast: Shinzō Abe and the New Japan; Chicago-born Cubs fan now living in DC; marathoner.
Substack: Observingjapan.substack.com.
Business: www.japanforesight.com
Florian Stöger @fdms.eu Young explorer // trains and spaces, travel and places // transit information design and local politics by day, rail travels by night // from Vienna 🇪🇺
Connor Crowley @croweleycf.bsky.social Chocolate chip cookie supremacist.
Used to repair MTA radios, then built skyscrapers in NYC, then did quantum computer things in Zuid-Holland. Now trying data centers.
CrossFit is a terrorist organization.
Shane Phillips @shanedphillips.bsky.social Housing guy. Researcher at UCLA Lewis Center, host of UCLA Housing Voice Podcast, author of The Affordable City, resident of Los Angeles.
Chairman Goa Tse-tung @jctenton.bsky.social these are some pictures i took. please don't put in the newspaper that i got mad
Fuji X-T5. some straight out of camera, mostly edited nowadays, some film (mostly shooting minolta and pentax). chaos reigns
Bruce R McF (etc.) @brucermcf.bsky.social Obscure development & regional economist, teaching in South Carolina and living in both South Carolina and Tennessee. He/him
Tomáš Baránek @tombarys.bsky.social Kateřina’s husband. Publisher, writer, father and son. CZ http://melvil.cz https://lifehacky.cz. EN http://lifehacky.net / dev of https://dotolist.eu / https://nautilus-omnibus.web.app / https://pollariser.eu / #clojure / 🇨🇿🇪🇺🇺🇦 / AI hype hater
Borners @borners.bsky.social Transit Costs Project Researcher
英国基進主義者 English state buildingism.. in the Sino-Japanese).
I crow for the dawn, like this rooster by Kano Sansetsu, my mind in his 10 Snow incidents landscape.
Alex Iljaszewicz @alexiljas.bsky.social BA (Hons) Airline and Airport Management graduate from Uni West London (1st). NWAirAmbulance Charity staff, graphic design, Human Factors, MBCS.
John Allspaw @allspaw.bsky.social Cofounder, @AdaptiveCLabs, “the NTSB of Tech” bringing Resilience Engineering to industry. he/him. Won’t speak on all-male panels, and #blacklivesmatter.
Steven Shorrock @stevenshorrock.bsky.social Psychologist & transdisciplinary humanistic, systems & design practitioner | Work, organisations, complexity, risk, justice | Autism, long covid, ME/CFS |
FBPsS CPsychol CErgHF PhD
🐝🇫🇷🏴 humanisticsystems.com
James Titcombe @jamestitcombe.bsky.social 
Suzette Woodward @suzettew.bsky.social 🦋 Professor #ptsafety expert for over 25 years and 45 in #NHS - author of 3 books so far! Still learning 🤗. Patient Safety Now - on sale - contact and blog via suzettewoodward.org
#safetysky #hfesky
IFATCA @ifatca.org The International Federation of Air Traffic Controllers' Associations (IFATCA) unites professional associations of air traffic controllers from around the world and aims to promote safety, efficiency, and regularity of international air navigation.
Human in the loop @humanintheloop.bsky.social Health services researcher | PhD | Decision-making for dynamic systems | Time series forecasting | Human-centred design | University of Cambridge
Barry Kirby @bazkirby.bsky.social MD of K Sharp Ltd, Human Factors Practitioner, Podcaster (1202podcast.com), tech geek and dabbler in politics. 
Eamonn Brennan @eamonnbrennan.bsky.social I write Buzzer, a college basketball newsletter, at eamonnbrennan.com. I do other stuff, too.
Rob Fleming @robjimfleming.bsky.social Doctor / Academic | Specialist (SAS) Anaesthetist | Clinical Associate Professor | UK | He / him | FRCA | Award winning irreverence | "non-sea lion" | Part of @SAScollective.com | #SASsix | #PERUSEbeforeYouInfuse
Opinions many, all very much mine!
Multisolving Institute @multisolving.bsky.social Learn about multisolving- solutions that help the climate, and help people here and now.
Dr. Elizabeth Sawin @bethsawin.bsky.social Director Multisolving Institute. She/her. Systems thinking, climate justice, and multisolving, with a sprinkle of gardens and the odd puns. @bethsawin on X
Human Factors Cast @humanfactorscast.media Podcast about all things Human Factors, Ergonomics, psychology, and design. 
Way of the Wing @daveenglish.com 👨🏼✈️ Airbus & glider pilot.
✈️ Posting my perpetual pursuit of piloting perfection.
🇬🇧 Really English.
🖥️ Online at www.WayoftheWing.com.
Laura Maguire @lauramaguire.bsky.social Usually up high 🏔️🪂🧗🏽♀️ Cognitive Systems Engineering Research and systems design.
I study cognition, complexity, and human performance in high risk, high consequence and high value work systems. 🧠
#resilience #humanfactors #cognitivesystemseng
Human Factors and Safety Group & Virtuocity @hfs-its-leeds.bsky.social We investigate road users’ interactions with new and current transport systems and technologies to advance transport safety @Institute for Transport Studies, University of Leeds.
Neil Linscheid @nlinscheid.bsky.social Entrepreneurship, Community Ergonomics, Economics, Human Factors, Community Development, and Small Towns at University of Minnesota Extension.
Magnus Ramage @magnusramage.bsky.social Academic (Open University), Quaker, systems thinker, EDI practitioner, cyclist, choral singer, parent, spouse. Introvert, but quite good at committees and networking. Christian-ish, socially progressive, economically soft-left. 🌈
James Shelley @jamesshelley.com Strategy wonk, skunkworks dev guy
Bela Banathy @belabanathy.bsky.social
Grandpa, Dad,, husband, teacher; Interests: climate change, saving democracy, what is information?, DIY electric car conversion.
Matt Lloyd PLY @mattlloyd.bsky.social Husband. Geek. Maverick. Failed rock star. Paralympian (Ice Hockey). Interested in systems thinking. Problem Solver. PhD Researcher. Listens to music. Reads books. Views my own.
Jim Spohrer 2024 @spohrer.bsky.social Books, Science, Nature (good hikes in California), Service Science, Artificial Intelligence, Open Source, Quest for Geothermal-Powered , Master-Mechanic-Robot for Family Farms.