Jackknifed tractor-trailer, overturned box truck cause major delays on inner-loop of DC beltway

A jackknifed tractor-trailer and an overturned box truck are causing major delays on the D.C. beltway Thursday morning.

The accident happened around 5 a.m. on the inner-loop of Interstate 495, between Connecticut Avenue and Georgia Avenue.

Several lanes of traffic were closed with vehicles only able to get by on the right shoulder. traffic reopened around 7 a.m.

The cause of the accident is unknown. Traffic delays are expected to continue through rush hour.