Matt's schtick is automated, large-scale FOIA requesting; he obtains huge collections of data from cities and then tries to do interesting stuff with it. Here, he apparently managed to get all the tickets in Chicago for several years running, and then used that data to fix the parking signs. This, to me, is so neat.
Hey! Thanks for posting this, and the kind words. Interesting note about getting data like this - Illinois FOIA allows a requester to submit a SQL as part of their request.. so long as they know the tables and columns within the database ;)
SELECT *
FROM information_schema.tables
And SELECT *
FROM information_schema.columns