ROUND ROCK, Texas (KXAN) — A rolled-over 18-wheeler shut down all southbound traffic on Interstate 35 for nearly six hours Thursday in Round Rock.

Round Rock police said all lanes reopened at 2 p.m. Thursday.

Round Rock police say traffic was stopped just south of RM 1431 and University Boulevard, with all traffic being detoured to the frontage road. Two other vehicles were involved in the wreck, RRPD said. A tow truck moved those before crews dealt with the 18-wheeler.