Keep an eye out Chicago, specific signs around the city actually mean something for the coming months. Right now, until April 1st, the winter overnight parking ban is in effect.
You may recognize this as the signs across most major streets in the city that have a giant snowflake on them. The ban lasts from 3 a.m. to 7 a.m. on 107 miles of main streets regardless of snow. There is a different tier of the sign as well that prohibits 500 miles of streets of parking outright if there are 2 inches of snow on the ground.
The reason for the ban is to allow clear streets for snow plowing and salting in case of snow during the night, especially in places were snowed in cars can heavily impede traffic flow for busses and emergency vehicles. Some streets on the list nightly parking ban include Milwaukee Avenue, Division Street, Kedzie Avenue, South State Street, and South Archer Avenue.
If you want a full list of Street and ways to contact the city if you do get towed, head on over to the main article here.