All southbound lanes of the Dallas North Tollway are currently shut down near the Galleria in Dallas because of a large piece of equipment that fell off a tractor-trailer.

What we know: According to the Texas Department of Public Safety, the accident happened around 5 p.m. on Thursday on the southbound side of the tollway at Interstate 635.

Images from SKY 4 showed a large piece of equipment on the roadway and damage to the underside of an overpass.