6:24 p.m. Update:

The lanes reopened shortly before 6:20 p.m., according to police. Delays are likely to linger, so expect major headaches if you’re heading that way. In addition, watch for backups on nearby stretches of the Capital Beltway.

Earlier:

U.S. Park Police shut down the northbound lanes of the George Washington Memorial Parkway during Thursday’s evening commute after a car went over a guard rail north of Rossyln, officials said.

The accident happened near the overlook just north of Spout Run Parkway at about 5 p.m., officials said.  There was no immediate information about injuries. Police were investigating the incident.

Further details may follow.