A deadly crash shut down a key stretch of southbound Highway 67 near Duncanville this morning, snarling traffic for drivers headed toward Dallas as emergency crews flooded the scene. One person was killed in the collision, which forced authorities to close the southbound service road and the rightmost southbound lane between Danieldale Road and Main Street.
Dallas County traffic deputies, along with firefighters and medics, responded to the highway during the morning commute and quickly set up a large active scene. The crash triggered significant backups for southbound traffic, and as of mid-morning, investigators were still on-site processing evidence and working around wreckage in the roadway.
Officials' updates
The Dallas County Sheriff’s Office pushed out a traffic alert on X, saying deputies were working a “major crash with a fatality” on southbound Highway 67 between Danieldale Road and Main Street and that the “SB service road and the right lane of SB 67 are blocked.” According to the alert from the Dallas County Sheriff's Office, the crash remains under investigation, and officials have not released any details about the person who died or whether any charges might be filed. The post carried an initial alert time of about 7:30 a.m.
Traffic Alert: southbound Highway 67 between Danieldale Rd and Main St. Dallas County Sheriff’s Office Traffic Deputies are working a major crash with a fatality. Crash is still under investigation. SB service road and the right lane of SB 67 are blocked. Post time 7:30am pic.twitter.com/5dqIfJCh4d
— Dallas Sheriff’s Office (@Dallas_Sheriff) March 29, 2026
Traffic impact
The Texas Department of Transportation’s travel information system reported an incident at US67S Main St in Duncanville and confirmed closures affecting the southbound lanes and the frontage road. According to the Texas Department of Transportation, drivers should expect delays in the area and consider alternate routes, including I-20 or nearby surface streets, while crews continue clearing the scene. Commuters reported heavy backups on connecting ramps and surrounding service roads during the peak of the morning rush.
Investigation and what to expect
Dallas County sheriff’s traffic deputies are leading the investigation and working to determine what led up to the deadly collision. The agency has not released the name of the victim or any other identifying information while the investigation is ongoing. Officials have asked anyone who may have dash-camera video or nearby surveillance footage related to the crash to contact the sheriff’s office. Additional information is expected once on-scene investigative work wraps up and TxDOT is able to fully reopen the roadway.
