Standing at the corner of State and Jackson seven o'clock one Sunday morning, a plainly dressed black man in his 40s stuck out his hand to a passengerless yellow cab.
The cab didn't stop.
Reaching in his jacket, the man fished out a beige, saltine-size notebook, jotted something, and put the notebook back.
"You studyin' taxicabs?" a man waiting at the bus stop wanted to know. "Is there a white guy on the next corner doing the same thing?"
"Something like that. It's for the city. I can't really talk about it."
"What are you finding out?" said the man waiting for the bus.
"A lot of people are gonna lose their licenses."