AUSTIN -- An accident backed up traffic on Interstate 35 in North Austin.
An overturned truck closed all but one lane of northbound I-35 near Wells Branch Parkway around 9 a.m. Tuesday. The northbound frontage road was also closed.
The southbound side of I-35 seemed to be moving slowly due to rubbernecking.
It's not clear yet what caused the big rig to crash.
Click the video above to see raw footage from KVUE viewer Rose Buchanan.