Austin police say a man in his 20s is dead after a rollover crash on South Mopac Expressway early Sunday morning.

Police say the driver was heading northbound at La Crosse Avenue when he hit a barrier on the road and the vehicle rolled over.  

Austin Travis County EMS say the man died at the scene. Police say no other vehicles are involved in the crash and the public should expect traffic delays while officials clear the scene. 

The area where the crash happened is under construction as Texas Department of Transportation crews work to add new lanes.