As all my readers probably know, I love London. And in loving London, I love the Tube and the Oyster Card and all that goes along with Transport for London. But, I have noticed that sometimes when I take the Underground, there are segments where it gets a bit loud, especially with the windows open. The Economist covered this in a recent article where they looked at some data from a London-based design firm that makes noise protective gear. (For purposes of bias, that seems important to mention here.)
The data looks at decibels in a few Underground lines and when the levels reach potentially harmful levels. I took a screenshot of the Bakerloo line, with which I am familiar. (At least from Paddington to Lambeth.) Not surprisingly, there are a few segments that are quite loud.
I like this graphic—but like I said about bias, I’m biased. The graphic does a good job of using the above the 85-decibel line area fill to show the regions where it gets loud. And in general it works. However, if you look at the beginning of the Bakerloo line noise levels the jumps up in down in noise levels, because they happen so quickly in succession, begin to appear as a solid fill. It masks the importance of those periods where the noise levels are, in fact, potentially dangerous.
I have had to deal with this problem often in my work at the Fed, where some data over decades is available on a weekly basis. One trick that works, besides averaging the data, is thinning out the stroke of the line so the overlaps do not appear so thick. It could make it difficult to read, but it avoids the density issues at the beginning of that chart.
All in all, though, I would love a London-like transport system here in Philly. I’d rather some loud noises than polluting cars on the road.
Credit for the piece goes to the Economist Data Team.
Yesterday we looked at Billy Penn’s graphics about the cooler stations and I mentioned a few ways the graphic could be improved. So last night I created a graphic where I explored the limited scope of the data, but also showing how low the temperatures were, relative to the air temperature outside, using weather data from the National Weather Service, admittedly from Philadelphia International Airport, not quite Centre City, which I would expect to be warmer due to the urban heat bubble effect.
I opted to exclude the Patco Line since the original dataset did not include it either. However a section of it does run through Centre City and could be relevant.
Credit for the piece goes to me, though the data is all from Billy Penn and the National Weather Service.
For my frequent readers, it will be no big surprise that I am avid supporter of public transit, especially the railways. Consequently I was delighted when I read a non-Brexit piece in the Guardian yesterday that looked at public transit systems in several cities.
But it did so by comparing earlier plans or systems to those in existence today.
Each design is slightly different and reflects the source material for the various cities. But I naturally selected the Philadelphia map. One of the biggest things to notice are the lack of trams/trolleys north of Girard and the addition of the River Line.
Transport for London (TfL), the organisation that runs the London Underground or Tube, has announced a nighttime service called Night Tube. It is not for the entire system, but only a few specific lines. That means that TfL needed a new map. And that means that everyone will want to create their own version of the Night Tube map. So this article at City Metric looks at just that. The TfL version is shown below.
Credit for the original goes to Transport for London.
Today’s post is the graduate work of Michael Barry and Brian Card of Worcester Polytechnic Institute. The two looked at the available public data of the Massachusetts Bay Transportation Authority (MBTA)—the T to those that know—to better understand the Boston area subway system. Here the subway system refers to the heavy rail lines, i.e. the Blue, Orange, and Red lines.
In short, the piece has a lot to look at that is worth looking at. This particular screenshot is an analysis of the stations across all times on average weekdays and weekends. You can see how in this particular selection, the size of the station markers pulse depending upon the time of day and the number of turnstile entries. Meanwhile the charts to the right show you the density through time of said entries and then compares the average number of turnstiles entries per day. Text beneath the system map to the left provides a short analysis of the data, highlighting work vs. home stations.
Credit for the piece goes to Michael Barry and Brian Card.
Massimo Vignelli died yesterday at the age of 83. Fastco has a much better article than I think I could read, this image is from their piece but is of Vignelli’s transit map for New York. I wrote about an interactive piece several years back that allowed you to compare Vignelli’s map to the new system map for the MTA.
Wrapping up this week of map-themed work, we have xkcd. He created an integrated map of North America’s subway systems from Vancouver to Chicago to Philadelphia to Washington to Mexico City.
I only wish I could take the Red Line from Belmont and transfer to the Market–Frankford near West Trenton. Because I could then take the (Frankford) El out to 69th Street and catch the 104 to West Chester.