A deadly crash brought southbound Research Boulevard to a hard stop Sunday morning in north Austin, as police shut down all lanes between Great Hills Trail and the MoPac (Loop 1) interchange, and traffic stacked up for miles around the closure.
Drivers reported grinding delays on the surrounding frontage roads while first responders worked the scene. The Austin Police Department described the incident as a “fatality collision” and warned commuters to steer clear.
In a post on the Austin Police Department's social media, officers said the southbound lanes were “closed between Great Hills Trail and MoPac” and told drivers to “expect significant delays” as the investigation got underway. The alert went out during the morning rush and served as the first public confirmation of the crash.
the southbound lanes of research bvld are currently closed between great hills trail and mopac due to a fatality collision. expect significant delays in the area. – wc1 #ATXtraffic
— Austin Police Department (@austin_police) March 29, 2026
Where the closure is and why it matters
The shutdown hits a particularly busy stretch of southbound Research Boulevard just before the MoPac interchange, a corridor that the city’s Vision Zero program and police crash reports have repeatedly flagged for serious wrecks. The city’s fatal-crash tracker records multiple deadly incidents along Research Boulevard and MoPac in recent years, highlighting ongoing risks at high-speed merge points, according to Vision Zero ATX.
What drivers should expect
Commuters are being warned to brace for heavy backups on nearby arterials and ramps while the scene remains active, especially during the morning drive. For up-to-the-minute information on closures and when lanes begin to reopen, the City of Austin posts active incident updates on the City of Austin traffic reports page, which compiles alerts from APD and other agencies.
Investigation and how to help
APD had not released further details about the victim or what may have led to the crash at the time of the alert. Investigators with the department’s Vehicular Homicide Unit were expected to document the scene as part of the standard fatal-crash protocol.
Anyone with information is asked to contact APD’s Vehicular Homicide Unit Detectives at (512) 974-6935, per the city’s fatal-crash tracker.
