An accident on Northbound I-81 at mile marker 315 in Frederick County has three lanes closed.
As of 2:30 pm on Wednesday, traffic is backed up to mile marker 310.
Stay with TV3 for updates.
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UPDATE: All lanes are back open on I-81, but there is still traffic within two miles of the accident.
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UPDATE: As of 4:00 pm the accident is clear and traffic is moving.
