Desktop notifications are on   | Turn off

Get breaking news alerts from The Washington Post

Turn on desktop notifications?

Yes Not now

It looks like you've previously blocked notifications. Please update your browser permissions to allow them.

The Washington Post

Authorities said crews are resolving the issue.

Starting around 10 a.m. or 10:30 a.m., union leaders said, they expect "a couple hundred cars" to drive around Columbus Circle in front of Union Station.