linkstream2 microblog

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“Health benefits are harder to quantify, especially in smoggy cities like Beijing. Mobike has found that its bikes are used more or less as much when the air is really bad as when it is not, suggesting that the good done by exercise may be undone by heavy breathing in toxic air. But in less-polluted cities the gains from exercise are larger than the risks from road accidents or air pollution, according to a study of Barcelona in the British Medical Journal.
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How #bikesharing conquered the world
https://www.economist.com/news/christmas-specials/21732701-two-wheeled-journey-anarchist-provocation-high-stakes-capitalism-how Using tech to overcome the problem of theft. Getting health benefits from exercise to counterbalancing breathing polluted air. Reducing congestion a bit.

What Does @Tesla’s Automated #Truck Mean for Truckers?
https://www.Wired.com/story/what-does-teslas-truck-mean-for-truckers/ What does it mean for drivers?! I guess: much safer highways & fewer tailgated & terrorized motorists!

Mapping #AirPollution with new mobile sensors
https://www.EDF.org/airqualitymaps Quote: “Any business that relies on heavy-duty diesel trucks can pose a health risk to its neighbors.”

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“This is one of several spots that caught our interest: High levels of pollutants in an area that includes homes, and this playground, close to industrial warehouses. Any business that relies on heavy-duty diesel trucks can pose a health risk to its neighbors.”
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QT:{{"
“This elaborate gadgetry is part of a five-year study that aims to find out at what point the harm done by pollution to cyclists might outweigh the health benefits accrued from the exercise.

The strapped-on sensors measure levels of PM 2.5, the fine particulate matter that is about one-thirtieth the diameter of a human hair and thought to be particularly harmful to health. The tiny particles, including black carbon, the main component of soot, penetrate deep into the lungs and bloodstream and may lead to the development of respiratory illnesses like asthma and lung cancer. Even relatively short-term exposures can increase body-wide inflammation and boost the likelihood of strokes and heart attacks.
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A 2014 report issued by the New York City Health Department said that particulates in the air cause more than 2,000 premature deaths and 6,000 emergency room visits and hospitalizations each year.
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On Your #Bike, Watch Out for the Air https://www.NYTimes.com/2017/07/06/well/move/on-your-bike-watch-out-for-the-air.html City riding may bad for the lungs, involving inhaling air w/ high PM 2.5 levels

More NYers Opting for…the Bike Lane – 450k trips/day v. 170k in ’05
https://www.NYTimes.com/2017/07/30/nyregion/new-yorkers-bike-lanes-commuting.html But there’s #bikelash from walkers & drivers

We still don’t really know how #bicycles work
http://www.NewStatesman.com/science/2013/08/we-still-don%E2%80%99t-really-know-how-bicycles-work Still rides upright with special wheels cancelling gyroscopic effect

QT:{{”
“The most definitive analysis came exactly a century later. It involved an experimental bicycle that had all its gyroscopic effects cancelled out by a system of counter-rotating wheels. The effort of building such a strange contraption was worth it: the resulting paper was published the prestigious journal Science.
The publication plunged bicycle dynamics back into chaos. It turns out that taking into account the angles of the headset and the forks, the distribution of weight and the handlebar turn, the gyroscopic effects are not enough to keep a bike upright after all. What does? We simply don’t know. Forget mysterious dark matter and the inexplicable accelerating expansion of the universe; the bicycle represents a far more embarrassing hole in the accomplishments of physics.”
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Paper bike helmet wins @JDF award
http://www.bbc.com/news/technology-38004215 ~$4 foldup @EcoHelmet might be useful for shared #bikes; degrades after a few uses

#Bike lanes are a sound public health investment
http://www.reuters.com/article/us-health-costbenefit-bike-lanes-idUSKCN11Z23A Each $1.3K for NYC provides 1 additional QALY for city residents

….But perhaps non-riders benefit more than riders (who are at risk for injury) cc @dspakowicz

New study of the economics of adding more bikes to NYC (ironically published in the journal “injury prevention”).
article: http://injuryprevention.bmj.com/content/early/2016/09/09/injuryprev-2016-042057.abstract

pop press article:
http://www.reuters.com/article/us-health-costbenefit-bike-lanes-idUSKCN11Z23A

QT:{{”
Every $1,300 New York City invested in building bike lanes in 2015 provided benefits equivalent to one additional year of life at full health over the lifetime of all city residents, according to a new economic assessment.
That’s a better return on investment than some direct health treatments, like dialysis, which costs $129,000 for one
quality-adjusted life year, or QALY, said coauthor Dr. Babak Mohit of the Mailman School of Public Health at Columbia University in New York.
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Painting unprotected bike lanes into roads may not reduce injury and death, she said.
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The Road Ahead http://www.AmericanScientist.org/issues/feature/2016/4/the-road-ahead A future w. sensors in cars, roads & bridges. Could they also be added to #bikes to avoid collisions?

http://www.wsj.com/articles/in-new-york-city-its-a-crush-to-find-a-citi-bike-during-rush-1473988014