[flickr]photo:5103472743[/flickr]
CDOT, NHTSA, and Western Michigan University are involved in the installation of these optical illusion zig-zag markings, part of an experiment to see if they improve night time visibility. You can read more about them on Steven Can Plan. Since installation, I’ve asked CDOT multiple times for the results of the experiment and each time the report hasn’t been finished.
A reader forwarded me an announcement email about the National Highway Traffic Safety Administration’s (NHTSA) Traffic Safety Facts 2010 Data (.pdf) in which one of the “facts at a glance” included this one: “Close to 70 percent [of fatal pedestrian crashes] took place at night”. He asked, “What percent of ped fatalities in Chicago happen at night? 70% seems disproportionately high.”
I looked it up. “Night” in this analysis means situations where the Illinois Department of Transportation crash data is coded as “Darkness” or “Darkness, lighted road”. I’ve divided the data in a table below to show the difference between those two designations. Continue reading 70% of pedestrian deaths happened at night nationally. What about in Chicago?