Freezing rain, is the quickest way to shut down a transportation system !!!
When I lived in Chicago, I worked at Chicago's Midway Airport, there was a major railroad yard just about a mile or so south of the airport .
Every major north/south arterial surface street for 9 miles, either had a bridge to go over the yard, or tunnel beneath it .
Forget about getting to work, or getting home, if we had any amount of freezing rain .
The traffic piled up at either side of the bridge, or at the bottom of the tunnel .
Not even to mention the havoc it caused to the air transportation system .
At 1230, we've got high thin clouds, and 60 f. (16C) .