Federal offices in the Washington area will open to the public at 11 a.m. Monday and federal employees are being advised to stay off the roads until 9 a.m. because of “expected icy conditions,” the Office of Personnel Management said Sunday.

Workers will be given an excused absence until 11 a.m. if they arrive late, OPM said. If inclement weather persists, workers will have the option to use unscheduled leave or unscheduled telework time for the workday.

Emergency employees are required to report on time, OPM said.

The delayed start to Monday’s federal workday is the first since OPM revised its inclement-weather policy last fall. Changes were made after a chaotic evening commute last January, when thousands of drivers were trapped in gridlock for as long as 12 hours.

OPM now makes a 4 a.m. announcement about whether the federal government will open late or close for the day. But it’s planning to make the decision even sooner, sometimes as early as the previous evening, depending on the forecast.

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