Roby Greenwald

Roby Greenwald

@roby.bsky.social

Associate Professor in the Georgia State University School of Public Health (any views expressed are my own). I measure the effect of urban environments on public health, especially the role of transportation on air pollution and physical activity.

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In the 80's, there was a conspiracy theory widely believed to be true. It goes like this: a new carburetor had been invented that got 100 mpg, but oil companies bought the patent and squashed it. The thing they were describing was a fuel injector. When those became common, they did not get 100 mpg.

White oak in the Kirkwood Urban Forest had to come down today. The stump diameter is over 48”. By my ring count, it would have been a sapling during the Battle of Atlanta, which started just a 100 yards or so away from here.

A modest proposal to help fix a pinch point for bikes and scooters near Oakland Cemetery in Atlanta. The total cost would be a rounding error in the city budget.

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The whole project is less than two blocks long but would greatly improve the bike route from everywhere SE of the tracks into Downtown. The City could leverage off of the State's bike route investment on Memorial. It's a win-win-win.

A modest proposal to help fix a pinch point for bikes and scooters near Oakland Cemetery in Atlanta. The total cost would be a rounding error in the city budget.

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A modest proposal to help fix a pinch point for bikes and scooters near Oakland Cemetery in Atlanta. The total cost would be a rounding error in the city budget.

The problem: Grant Street is the only "safe" place for bikes to cross the train tracks between Downtown and Krog (about 1.5 miles). And even that spot isn't great.

Another problem: Oakland Avenue is one-way headed north between MLK and Memorial (but is very wide with more than enough room for a bi-directional bike lane).

Roby Greenwald reposted

I love paying TurboTax a few hundred bucks every year to figure out how much money I owe the government, which the government already knows, but won't tell me because TurboTax pays legislators to keep the government from telling me. 😍

Just remembering this cringe moment in history. I still don’t know what Obama supposedly did to make Lincoln cry, but I wonder how strong the cognitive dissonance is in everyone who made this go viral.

Roby Greenwald reposted

If you’re on a budget and looking to rent an older apartment, would you rather: A. Compete against high-earners who also want that apartment B. Not compete against high-earners because they’re moving into a shiny new apartment that just got built somewhere else

artiststudioap.bsky.social@artiststudioap.bsky.social

Despite all of the abundance bro noise in these comments, the fact remains: increasing supply AT THE HIGHER END will never ever ever bring down rents at the lower end (which is where most of us dwell). It never has. It never will. Any sane housing policy will sideline and regulate the “market.”

Roby Greenwald reposted

Your daily reminder that the fastest Dallas-to-Houston trains did the whole 280-mile run in 4 hours flat, often going faster than 100 mph. They managed to do this in the 1930s, with trainsets powered by V8s only capable of 600 horsepower but that still weighed 12,000 pounds.

Roby Greenwald reposted

China's Xinhua news agency has just published this editorial cartoon in response to Trump's rejection of climate policies. It is pretty clear that China views this as a HUGE geopolitical fumble by the US leaving the field clear for China's to win the global race to clean-tech hegemony

Who wants affordable housing in a post-gentrification neighborhood? I do. Here's a proposal to build 47 units of supportive housing on land currently zoned single-family. This would increase the housing supply by a factor of 6 compared to the current zoning. The neighborhood voted 2 to 1 AGAINST it.

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This now goes to city Zoning Review Board. I hope they consider the fact that the city's future growth and prosperity depends on there being more housing in walkable places that doesn't exacerbate auto-dependency.

Who wants affordable housing in a post-gentrification neighborhood? I do. Here's a proposal to build 47 units of supportive housing on land currently zoned single-family. This would increase the housing supply by a factor of 6 compared to the current zoning. The neighborhood voted 2 to 1 AGAINST it.

It is in a walkable neighborhood with most necessities within a 5-10 minute stroll. Two MARTA stations are a 20 minute walk. Downtown Atlanta is a 25 minute bicycle ride. I know all these statements to be true because I frequently make all of these trips on foot, by bike, or on MARTA.

The most vocal opposition hits all the usual talking points: it's out of character for the neighborhood, it's too much density, where's everyone gonna park? I live 3 blocks away, and I assure you the answer to all those questions is <massive eye roll>.

Somewhere in LA, there’s a guy who’s gonna tell his grandkids he saw 36 innings of WS ball, and they’ll be like, you went to FOUR games? and he’ll be like, No, but Dodgers won both times.

These kind of Catch-22’s are an impediment to wider adoption of efficient travel modes. Cars and pedestrians are allowed to go, but bikes are told to stop. The bike path turns into a narrow sidewalk with no plan for to get off. If you want more people to do this, you have to make it easy!

Don’t be fooled by “If it bleeds, it leads” sensationalism. Any trip that you can take by transit will reduce your risk of injury or death by 2-10x compared to taking that same trip by car.

I wonder if historical examples of civilizational collapse had a counter-culture of people warning that maybe this wasn’t such a great idea. I want to hear those stories.

Urban highways are associated with reduced social connections in U.S. cities. The top 50 cities all show reductions in social connections with Cleveland and Orlando being the worst and NYC and Portland being the least bad. Atlanta ranks 17th (better than I expected). Source: doi.org/10.1073/pnas...

This letter is making the rounds, and it is spot on. The city cannot grow by expecting all future residents to drive everywhere (I mean, it can, but it would suck for everybody), and people can’t choose to do anything else if you don’t give them an option.

atlanta.urbanize.cityLetter to Editor: Canceling Eastside light rail is waste of time, precious moneyFollowing years of design, pivot to Southside Trail leaves “transit-starved Atlantans” wanting, writer asserts