• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Somerville Mask Usage

    June 30th, 2020
    covid-19  [html]
    Two months ago, Somerville made facecoverings mandatory, both indoors and out. A few weeks later the state of Massachusetts required them "in public places where social distancing is not possible". A week ago Somerville reduced its requirements in light of the heat: "during the summer months, when you are outside and able to social distance at least six feet from others, you may temporarily remove your face covering but must put it back on when others are nearby."

    I was curious what people were actually doing, so while Anna was playing in the "woods" along the edge of the bike path, I gathered some statistics. As each person passed along the path, I tracked mode of transportation (walk, run, bike, scooter/skateboard), apparent gender (female, male, child, unclear), and face covering status (covered, mouth only, removed, absent). Raw data is here.

    In forty minutes on June 28th, from 9:41am to 10:21am I saw 179 people pass. Of these, 73% (131) were masked, 5% (9) had their nose exposed, 15% (27) had masks on their chin or otherwise removed, and 7% (12) had no mask at all:

    With a person passing every 13 seconds, the path was a pretty crowded place. I only very rarely saw people putting on their masks, however, when coming close to others. For the analysis below I want to talk about people as being masked or not, and people with masks removed wouldn't qualify. Masks worn mouth-only are less clear, but since a large fraction of transmission seems to be via talking and coughing, I decided to count someone as masked if their mouth was covered, even if their nose was sticking out.

    When looking at people by transportation, walkers (74%, 62/84) were a bit less likely to be masked than others (82%, 78/95), but not by much:

    Looking by gender/age, women were less likely to be masked (72%, 56/78) than men (85%, 74/87). [1] Children were in between (77%, 10/13), though I didn't count children in bicycle trailers or strollers:

    I'm curious what numbers look like in other areas. Talking impressions with friends, it sounds like this is a higher fraction of people wearing masks than in most places?


    [1] I categorized people by apparent gender, and one person didn't read immediately as male or female.

    Comment via: facebook, lesswrong

    Recent posts on blogs I like:

    Not Everything is Like Rail Transport

    Sometimes, when I write about cost comparisons or public-sector incompetence, I see people make analogies to other fields. and sometimes these analogies are really strained. So I want to make this clear that I am talking about things that are specific to …

    via Pedestrian Observations April 30, 2021

    Collections: Teaching Paradox, Europa Universalis IV, Part I: State of Play

    This is the first post in a series that will be examining the historical assumptions of Paradox Interactive’s grand strategy computer game set in the early modern period, Europa Universalis IV. And this series will in turn be part of a larger series looki…

    via A Collection of Unmitigated Pedantry April 30, 2021

    Books and websites on babies

    Several people I know are expecting a first baby soon, and I wrote up notes for one of them. Might as well share here too: Medical:Scott Alexander’s Biodeterminist’s Guide to Parenting is an interesting read, and some parts are actionable.  If you live in…

    via The whole sky April 14, 2021

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact