Chicago's annual winter overnight parking ban is in effect from Dec. 1, 2014 through April 1, 2015.
Regardless of snow, the ban will be enforced along 107 miles of arterial streets each day from 3 a.m. to 7 a.m., according to a reminder issued from the city's Department of Streets and Sanitation.
Cars parked in violation of the overnight ban prevent routes from being fully plowed and salted when it snows.
The city began posting fliers on cars on restricted streets last week as a reminder.
Violators will be towed and will face a minimum $150 towing fee, a $60 ticket and a storage fee of $20 per day. Vehicles will be towed to Pounds 2 or 6, at 103011 S. Doty Ave. or 6 or 701 N. Sacramento.
Nearly 240 vehicles were towed on the first night of the ban last year, department officials said.
A separate permanent ban on another 500 miles of arterial streets is activated when at least two inches of snow are present to help facilitate the clearing of snow.
Both bans were implemented on designated streets to prevent traffic standstills during major snowstorms in 1967 and 1979.