HOUSTON --
An overturned rig shut down the NB I-45 exit ramp off the North Sam Houston Tollway WB for several hours this morning. The accident happened around 2:30am and cleared just before 5:30am. Crews were on the scene for several hours, cleaning up the debris left behind from the crash.
At this point, we don't know what caused the accident. The driver was not injured in the wreck.
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