UPDATE (KCEN) -- The semi was transporting large, metal pipes, which became loose and blocked the lanes of exit 301. Crews cleared the pipes to the shoulder so traffic could be diverted.
The driver, a 55-year-old Mississippi man, was not injured.
Investigators say the pipes shifted as the semi turned on a curve in the road. The weight of the pipes shifting caused the semi to overturn. The accident is still under investigation.
I-35 northbound was reopened at 3:25 p.m.
-----------------------------------------
UPDATE (KCEN) -- The overturned semi is now upright.
Officials are estimating cleanup to take 30 to 40 minutes. Traffic is now backed up for about four miles.
No one was injured in the accident.
-----------------------------------------
(KCEN) -- An overturned 18-wheeler has caused traffic to back up for about two miles near exit 301 on I-35 northbound in Temple.
The accident happened south of Loop 363 by Central/Adams on the highway. Traffic is being re-routed to the access road and the average speed of vehicles traveling through the area is seven miles per hour.
Officials are saying drivers should expect a delay of 20 to 25 minutes. There is no estimate on when the accident will be cleared.
The southbound side of the highway is also moving slowly, although there are no problems on the southbound side of I-35. The average speed on the southbound side is about 45 miles per hour.
