A large and heavy early-March snowfall snarled roadways in the Chicago area Tuesday.

Chicago Streets and Sanitation Commissioner Charles Williams said he expects main roads to be cleared by Wednesday morning.

“Tomorrow should be fine,” Williams said Tuesday. “My advice tomorrow is to go about your daily lives as normal. We will be out all night.”

The city stationed extra plows near Lake Shore Drive on Tuesday and removed a part of the median around North Avenue to avoid a repeat of the cars and buses trapped on the road during the Feb. 2, 2011, storm. Suburbs had their salt trucks and plows out in full force as well to keep up with the continuous flurries.

Vehicles spun out and crashed on several interstates. Metra spokesman Michael Gillis said slightly more people than usual took the system’s trains to work Tuesday.

Chicago Tribune contributed to this report

Some roadways moving well during snowy evening rush.

Chicago Department of Aviation’s Karen Pride said that in total, over 1,000 flights were cancelled at O’Hare and Midway airports.

The llinois Department of Transportation’s Mike Claffey says that despite IDOT’s best efforts, roadways are still slushy due to the snowstorm. Claffey urged evening commuters to be cautious.

Airlines canceled about 1,000 flights in advance of the snow.

The Chicago’s Department of Aviation department says more than 850 flights were canceled at O’Hare International Airport.

225 were canceled at Midway, not including Southwest Airlines, which has cancelled all flights between 10 a.m and 5 p.m.

The best advice, as always, is to check the status of your flight before you head to the airport.

The aviation department also says to arrive at the airport at least two hours in advance of the flight.

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An incoming winter storm is forecast to drop between four to eight inches of snow on the Chicago area Tuesday.

But morning commuters didn’t have it as bad as they will in the evening.

Some of them decided to ride Metra trains instead of taking their chances with the roads.

High winds blew the snow sideways at the Metra station in Glen Ellyn.

But that snow melted immediately after it landed.

But Metra passengers said they expected it to get wet and nasty later on.

“I just don’t want to be driving in it when I come home tonight,” said Metra passenger Marilyn White.  “So, I’d figured the round trip on the train was the better choice.”

The earliest train riders found themselves just getting wet, instead of walking in snow.

“There’s basically no snow on the ground right now, but I know it’s coming.  I was expecting a few inches this morning already,” said passenger Paul Voswinkel.