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Crashmapper: Visualizing Years of Traffic Collisions in NYC

61 点作者 talos将近 12 年前

10 条评论

salmonellaeater将近 12 年前
Obligatory XKCD: <a href="http://xkcd.com/1138/" rel="nofollow">http:&#x2F;&#x2F;xkcd.com&#x2F;1138&#x2F;</a><p>In Seattle a few intersections have been singled out as the most dangerous for cyclists because of the number of collisions involving cyclists there. Considering they are also the highest-traffic intersections for bicycles, it doesn&#x27;t actually say anything about how dangerous they are per cyclist-trip.<p>Crashmapper is useless without knowing how many vehicles pass each intersection per day.
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RobotCaleb将近 12 年前
I learned that pretty much every corner has crash potential. :)<p>We ran into a similar problem at my last job. I mapped crash locations in our game to the map in which they took place. When viewed in aggregate it ended up turning into more of a map of where people tend to congregate in the game then where problem spots actually exist.
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pixie_将近 12 年前
This is a good example where some color would really help.<p>There are points with the same color where their collision count is different by a factor of 10.
jessriedel将近 12 年前
Comment on style: The transparency of the orange heat spots should not fall below 30% or so, even at the center. Having the heat spots opaque makes the map difficult to read.
aggronn将近 12 年前
Huh. I worked at a place that had access to data similar to this, but statewide and in a different state. I wanted to put something like this together, but i was told the data was very sensitive and that I couldn&#x27;t get access to it, since knowing that some intersections are really dangerous opens up government agencies to lawsuits for not fixing them.<p>So its interesting to see this here.
eterm将近 12 年前
I like how on error he redirects to the application to serve custom urls giving a dual meaning to crash mapping.
Quai将近 12 年前
I&#x27;ve done something similar for Oslo, Norway; <a href="http://trafikk.quai.io/" rel="nofollow">http:&#x2F;&#x2F;trafikk.quai.io&#x2F;</a> (warning: Norwegian text)
jweir将近 12 年前
Great start!<p>It would be wonderful if you could enter a time span, rather than seeing one month at a time.<p>Maybe filter by daylight&#x2F;nighttime hours?
danso将近 12 年前
It&#x27;s worth pointing out this historical context mentioned in the OP&#x27;s Github:<p>&gt; <i>Council Member Jessica Lappin got into an animated discussion with Petito over traffic crash data. When Lappin asked why NYPD is releasing data in PDF form — and only after the council adopted legislation forcing the department to do so — Petito replied that the department is &quot;concerned with the integrity of the data itself.&quot; Petito said NYPD believes data released on a spreadsheet could be manipulated by people who want &quot;to make a point of some sort.&quot; An incredulous Lappin assured Petito that the public only wants to analyze the data to improve safety, not use it for &quot;evil.&quot;</i><p>This is a persistent problem in public records law: officials who are asked to provide public data in computer parsable formats but instead, deliver it as PDFs or worse, as paper printouts.<p>The reason given by the NYPD is so common a trope that it&#x27;s hard to say that they&#x27;re just technically slow. When you consider that the NYPD has taken strong criticism for not investigating fatal accidents seriously, it&#x27;s reasonable to suspect the NYPD of actively obfuscating when they use the &quot;oh but they&#x27;ll alter the spreadsheets!&quot;
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badmadrad将近 12 年前
for a second i thought this was mapping ethernet packet collisions and i thought it was cool but couldn&#x27;t figure out why we would need a heatmap