Nick Sementelli

@nsementelli.bsky.social

National progressive political strategist by day, local safe streets and housing advocate by night. @ggwash board member.

“Researchers found that children in London whose lung growth had been stunted by pollution showed impressive improvements after the introduction of an Ultra Low Emission Zone in 2019 reduced emission… …local clean air zones could help reduce some of the harm caused by pollution during childhood.”

Children's stunted lungs show recovery in ultra low emission zone

Children's lung capacity caught up with their peers in less polluted areas once a clean air zone came in, a study shows.

bbc.com

I think I need to work this Mumford quote into my class: "In short, we have had the alternative of humanizing the industrial city or dehumanizing the population. So far we have dehumanized the population.”

"Montreal was building the first legs of its subway in the 1960s. We could have built the equivalent of 36 Paris Metros for that $375 billion at the cost that Montreal was building its subway. And so part of this is just creating like an Earth 2 in my mind. What if we had gotten it right?"

The Overhead Wire@theoverheadwire.com · 23h ago

New #TalkingHeadways! Patrick Kennedy @thedotcity.bsky.social joins the show to talk about "An Atlas of Intercity Highway Impacts" - link.theoverheadwire.com/rakfd

I don’t think it’s accurate to say that the entire San Francisco region was "popping with [housing] construction" when it averaged like 1/3 of the permitting rate of Toronto or Vancouver (also cities that needed to build more).

Housing units permitted per 1,000 people in Toronto and Vancouver (higher) and San Francisco (lower)
Alex@alxlndomountain.bsky.social · yesterday

yet by 2018 the industry was so overheated that developers were routinely complaining about massive cost escalation and labor shortages as the entire region was popping with construction. might one consider that the industry was running at its red line?

This kind of credulous reporting about the Guard’s deployment in DC is a big part of the problem: 1. It’s not reducing crime; and even if it were that’s not a justification for their deployment. 2. It matters because unleashing military patrols in a U.S. city is fascist, authoritarian behavior.

Text of a Reuters article:

It's unclear whether it's reducing crime.
Murders have fallen, but so have homicides in many other cities. One recent study found the deployment reduced car thefts but had no measurable impact on violent crime.
Why it matters: Trump has promoted the deployment as a model for fighting crime in
U.S. cities. D.C. is becoming a test case for whether a military-style presence actually improves public safety.

"...each above-ground spot in a parking deck in and around Washington, D.C. can cost $29,000 to build. While that’s below the national average of $52,000, it would also mean that Trump’s proposed 32,000 parking spots could cost more than $900 million."

Martin Austermuhle@maustermuhle.bsky.social · 3w ago

One part of Trump's $22 billion makeover of Dulles that's been missed is his big, beautiful, world-record 32,000-spot parking garage. That's *way* more parking than recent estimates show the airport needs, and it would tower over the historic terminal: www.notus.org/metro/dulles...

Online shopping eliminated these gatekeepers and disintermediated the market, allowing consumers to express their desires more directly. And it turns out that what people really want is cheap disposable goods, not more expensive but higher quality stuff that lasts a long time.

it’s pretty obvious that a lot of people remember that COVID lockdowns were unpleasant and from there just extrapolate that they were therefore bad policy

RIP Louisa Gag, a transit planner who dedicated her career to making Boston’s streets safer for cyclists & pedestrians. She was killed while biking to work on July 9, 2026. Street safety improvements shouldn’t be delayed, watered down, or treated as a political inconvenience. Safe streets now!!

Are you passionate about pedestrian safety and accessibility? Do you find value in working with students on local civic engagement? Join us for a special edition of Sidewalk Palooza as part of this year's GW Day of Service on August 22. Reach out if you want to be involved!

Like in the first Trump term, people are standing around looking for some neutral arbiter to decide something is wrong and take action. The press stands around wondering about the voters. The voters stare back at the press. Some Democratic leaders hide behind a potted plant hoping they go unnoticed.

Julie K. Brown@jkbjournalist.bsky.social · 3w ago

New: Andrew and Tristan Tate are facing sex trafficking and child porn charges. Yet Trump world had a party for them. open.substack.com/pub/jkbjourn...

Riding bikes is 10X more important than electric cars for reaching net-zero cities. And that’s just the climate emissions. Doesn’t include the massive public & personal cost difference, the air & noise pollution difference, the massive space difference, etc, etc…Via @theconversation.bsky.social

Cycling is ten times more important than electric cars for reaching net-zero cities

Active travel can help tackle the climate crisis earlier than electric vehicles – even if you swap the car for a bike for just one trip a day.

theconversation.com

One of the myths of car ownership is that users fully pay for infrastructure costs. It’s only partially true, and in DC, it is not particularly true. Especially with the gas tax on the decline, it’s time to consider other options to sustainably fund the costs of building and maintaining our roads.

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Sometimes I think it’s too reductive to say that a car is a uniquely deranging object to own, but then I see people who claim left politics compare the people trying to turn a carpark into a children’s home to Netanyahu and I think “no, the car has made you crazy”

Claire McNab@2legged.mastodon.ie.ap.brid.gy · 4w ago

@kayfourbee.bsky.social Local authority decision would exacerbate local reource shortage. But instead of seeing a better decision which doesn't create a resources crisis, your preferred solution is to tell people to eff off. That sounds liks the Netanyahu approach to urban planning […]

Getting attached to individual politicians as people is kinda batshit behavior even under the best of circumstances but it's especially insane in The United States where there's an enormous amount of randomness and path dependency in terms of who gets into these high level elected offices.