The lanes are likely to be shut down for two hours, officials said.
Snow hit parts of Virginia south of D.C., causing a slow commute Monday.
The governors of North Carolina and Virginia declared states of emergency, and nearly half a million people were reported without power in the Carolinas, Virginia, Tennessee, Alabama and Georgia.
Fewer cars use I-66 during the tolling hours, but numbers increase after the toll lifts, part of a dramatic shift in travel patterns.
Court testimony and a recent congressional report detail a toxic workplace culture.
A national marketing campaign aims to let people know their options if they can't drive.
Metro says two dozen companies have already expressed interest in its plan to privatize operation of phase 2 of the Silver Line.
TAP Air Portugal is the fourth carrier to announce air service at Dulles this year.
Some roads around the Washington National Cathedral are already closed. Others will close as the funeral procession moves from the Capitol.
“It’s a big leap between testing this stuff and booking and transporting a passenger who’s paying money for a service,” said an automation expert at Carnegie Mellon.
Metro said the measure would lead to financial losses and increased crime, an argument activists and council members rejected. The legislation now goes to Mayor Muriel E. Bowser (D) for her signature.
The insect had apparently attempted to enter the U.S. as part of a shipment of Italian wine.