Which city made a pedestrian counter for less than $150?

In partnership with Edmonton, Alberta's CITYlab, a civic hacker named Brendan Gluth built an open source, low-cost pedestrian counter using a Raspberry Pi and cheap infrared sensor. The device was tested on an alleyway intervention project and two weeks of data were collected, which can be found at the city's website for Beta City, a civic-tech meetup.