The woman was struck just before 12 a.m. Sunday in the 1000-block of West Byron Street.
Witnesses say the 32-year-old victim appeared to be a city worker who may have been checking parked cars for residential zone parking permits. They describe the vehicle that hit her as a white SUV.
" I think a Honda four-door came around the corner at a high rate of speed-- I'd say about 35 or 45 miles per hour-- and struck her, pushing her up in the air and slamming her into the back of [another] vehicle," said witness John Drennan, who added that he hopes authorities track the driver down.
The other vehicle was damaged.
Drennan said investigators retrieved a mirror that broke off from the hit-and-run car.