Marcel Moran
@marcelmoran.com
San Francisco 🌁
City Planning, Sustainable Transportation, Spatial Science. Union Member. Banner by Bellows.
City Planning, Sustainable Transportation, Spatial Science. Union Member. Banner by Bellows.
Pinned
Marcel Moran
@marcelmoran.com
· Jul 29
*Scaling Pedestrian Crossing Analysis to 100 Cities*
For better decisions about pedestrian infrastructure, we need data that is both accurate to the block level + scaled up to entire cities. Our new pre-print, pursues this with an advanced computer-vision model
arxiv.org/abs/2507.20497
(1/5)
For better decisions about pedestrian infrastructure, we need data that is both accurate to the block level + scaled up to entire cities. Our new pre-print, pursues this with an advanced computer-vision model
arxiv.org/abs/2507.20497
(1/5)
Reposted by Marcel Moran
Energy transitions can happen faster than we think:
In 2000 almost 90% of Denmark's electricity was from fossil fuels.
In 2024 less than 10% of Danish electricity was from fossil fuels.
In 2000 almost 90% of Denmark's electricity was from fossil fuels.
In 2024 less than 10% of Danish electricity was from fossil fuels.
December 1, 2025 at 4:18 PM
Energy transitions can happen faster than we think:
In 2000 almost 90% of Denmark's electricity was from fossil fuels.
In 2024 less than 10% of Danish electricity was from fossil fuels.
In 2000 almost 90% of Denmark's electricity was from fossil fuels.
In 2024 less than 10% of Danish electricity was from fossil fuels.
Fantastic reporting from Nina Lakhani in the Guardian, and just so bleak when you think about the political geography of Appalachia
@ninalakhani.bsky.social
www.theguardian.com/environment/...
@ninalakhani.bsky.social
www.theguardian.com/environment/...
December 1, 2025 at 3:15 AM
Fantastic reporting from Nina Lakhani in the Guardian, and just so bleak when you think about the political geography of Appalachia
@ninalakhani.bsky.social
www.theguardian.com/environment/...
@ninalakhani.bsky.social
www.theguardian.com/environment/...
Think it's time we move the BayWheels station off of the 16th St Mission Plaza. The experience of starting and ending trips there is incredibly unpleasant (and unsanitary), and placing the dock on the street nearby would be a huge improvement. @baywheels.bsky.social @bart.gov
November 30, 2025 at 7:23 PM
Think it's time we move the BayWheels station off of the 16th St Mission Plaza. The experience of starting and ending trips there is incredibly unpleasant (and unsanitary), and placing the dock on the street nearby would be a huge improvement. @baywheels.bsky.social @bart.gov
Completely serious that if you are an academic and let AI write a peer-review for you, you should leave the field. You've broken the entire point of the collective project we're in.
The enshitification of scientific publishing marches on. First arXiv had to clamp down on submissions thanks to a flood of AI-written papers.
Now ICLR authors say their peer reviews were churned out by AI. Reviews full of hallucinated content that didn’t exist and offering useless, vague feedback.
Now ICLR authors say their peer reviews were churned out by AI. Reviews full of hallucinated content that didn’t exist and offering useless, vague feedback.
Major AI conference flooded with peer reviews written fully by AI
Controversy has erupted after 21% of manuscript reviews for an international AI conference were found to be generated by artificial intelligence.
www.nature.com
November 30, 2025 at 4:44 PM
Completely serious that if you are an academic and let AI write a peer-review for you, you should leave the field. You've broken the entire point of the collective project we're in.
Would love to see '26 and '28 democrat campaigns push for a global private-jet tax:
www.nytimes.com/2025/11/17/c...
www.nytimes.com/2025/11/17/c...
There’s a New Effort on the Runway to Raise Climate Funds
www.nytimes.com
November 30, 2025 at 2:00 AM
Would love to see '26 and '28 democrat campaigns push for a global private-jet tax:
www.nytimes.com/2025/11/17/c...
www.nytimes.com/2025/11/17/c...
Reposted by Marcel Moran
Can't wait to read all the policy studies of this case
Your periodic Baltimore homicides update: Baltimore continues to be on track for 150 homicides this year. If you look at the graph you can see how amazing this is, although, of course, that's still 150 too many.
November 29, 2025 at 11:14 PM
Can't wait to read all the policy studies of this case
First time I've seen electric buses as part of the SD MTS fleet
November 29, 2025 at 9:01 PM
First time I've seen electric buses as part of the SD MTS fleet
Etsy seems to have removed the location-filtering option of stores to any granularity but country. It used to be amazing to ensure you could use the marketplace shop local (e.g. just the Bay Area), but now that feature is gone. Why?
November 28, 2025 at 3:16 PM
Etsy seems to have removed the location-filtering option of stores to any granularity but country. It used to be amazing to ensure you could use the marketplace shop local (e.g. just the Bay Area), but now that feature is gone. Why?
Nice ride on the Blue Line
November 26, 2025 at 7:54 PM
Nice ride on the Blue Line
Seeing so many amazing people serve on Mayor-elect Mamdani's transition committees makes me so happy.
November 26, 2025 at 7:32 PM
Seeing so many amazing people serve on Mayor-elect Mamdani's transition committees makes me so happy.
Begging San Diego to build a connection from their airport to their light rail.
November 26, 2025 at 6:49 PM
Begging San Diego to build a connection from their airport to their light rail.
All hail airports where the subway goes directly to the terminal
November 26, 2025 at 3:41 PM
All hail airports where the subway goes directly to the terminal
There's always something fun about seeing something you've written "break containment" and start to be discussed in a different language. All the better when it's French!
November 26, 2025 at 2:34 PM
There's always something fun about seeing something you've written "break containment" and start to be discussed in a different language. All the better when it's French!
Reposted by Marcel Moran
solar is about to pass natural gas for power generation in California. good stuff www.eia.gov/todayinenerg...
Today in Energy - U.S. Energy Information Administration (EIA)
www.eia.gov
November 25, 2025 at 5:39 PM
solar is about to pass natural gas for power generation in California. good stuff www.eia.gov/todayinenerg...
Reposted by Marcel Moran
Our Executive Director, Ben Furnas, has been appointed to Mayor-elect Zohran Mamdani's Transition Committee on Transportation, Climate, & Infrastructure!
November 24, 2025 at 8:17 PM
Our Executive Director, Ben Furnas, has been appointed to Mayor-elect Zohran Mamdani's Transition Committee on Transportation, Climate, & Infrastructure!
A very funny (and common) response to this article has been "it's actually unsafe to drive slower than the flow of traffic"
And, it's like, yeah buddy, the flow of traffic should be *the speed limit*
And, it's like, yeah buddy, the flow of traffic should be *the speed limit*
November 25, 2025 at 9:42 PM
A very funny (and common) response to this article has been "it's actually unsafe to drive slower than the flow of traffic"
And, it's like, yeah buddy, the flow of traffic should be *the speed limit*
And, it's like, yeah buddy, the flow of traffic should be *the speed limit*
Valencia curb-adjacent (and protected) bike lanes have been excellent. San Francisco should apply the same treatment to many more busy streets!
Checking out the Valencia St bike lane. Unbelievable how much drama there was to get a parking protected bike lane here. More bikes and scooters have passed us than cars and there's still plenty of space for car parking, parklets and 2 travel lanes.
November 25, 2025 at 2:52 AM
Valencia curb-adjacent (and protected) bike lanes have been excellent. San Francisco should apply the same treatment to many more busy streets!
@hannahbeckler.bsky.social really impressed by your data-center reporting project. Sharing it in my GIS class tomorrow 🥳
November 25, 2025 at 1:24 AM
@hannahbeckler.bsky.social really impressed by your data-center reporting project. Sharing it in my GIS class tomorrow 🥳
The point I desperately want to get across is that how we *enforce* speed limits has altered American's understanding of the limits themselves. sf.streetsblog.org/2025/11/24/o...
November 24, 2025 at 11:55 PM
The point I desperately want to get across is that how we *enforce* speed limits has altered American's understanding of the limits themselves. sf.streetsblog.org/2025/11/24/o...
Last week, the New York Times listed the fact that Waymo driving the speed limit was a *downside*
I dug into how much that shows our understanding of road safety is broken:
I dug into how much that shows our understanding of road safety is broken:
November 24, 2025 at 11:40 PM
Last week, the New York Times listed the fact that Waymo driving the speed limit was a *downside*
I dug into how much that shows our understanding of road safety is broken:
I dug into how much that shows our understanding of road safety is broken:
Two weeks from today! Should be a super fun conversation on the intersection of imagery analysis and city planning with me and Prof. Ayda Kianmehr, and Prof. Maryam Hosseini. Free and open to the public: sjsu.zoom.us/webinar/regi...
November 24, 2025 at 6:28 PM
Two weeks from today! Should be a super fun conversation on the intersection of imagery analysis and city planning with me and Prof. Ayda Kianmehr, and Prof. Maryam Hosseini. Free and open to the public: sjsu.zoom.us/webinar/regi...
Noticing 19th St Oakland BART has labeled (numbered) exits. Good practice for wayfinding!
November 24, 2025 at 5:35 PM
Noticing 19th St Oakland BART has labeled (numbered) exits. Good practice for wayfinding!
We really need to hook up farmers market vendors to the grid - because running these for hours ain't it
November 22, 2025 at 9:07 PM
We really need to hook up farmers market vendors to the grid - because running these for hours ain't it