UPDATE 3:54 p.m.: All lanes have reopened on the outer loop of the Beltway on the American Legion Bridge, though traffic is expected to be delayed in that area for the remainder of the afternoon.

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All lanes on the outer loop of the Beltway are blocked on the American Legion Bridge after an accident involving a tractor trailer and a box truck, officials said.

Traffic is able to get by in the service road for Exit 43. Delays begin near River Road and stretch for approximately 3 miles.