Katy Freeway traffic: Traffic moving again after 18-wheeler rollover that caused traffic nightmare

Photo from the scene via SkyFOX.

UPDATE: The crash was cleared around 8:15 p.m. after causing a traffic backup for several hours when an 18-wheeler rolled over on Tuesday afternoon during rush hour. 

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A crash involving an 18-wheeler is creating a huge traffic nightmare for rush hour drivers on Katy Freeway. 

According to officials, the crash occurred on Katy Freeway westbound just before 99 (Grand Parkway). 

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Crews on the scene are working to get the 18-wheeler back onto its wheels. 

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All traffic is being diverted to the inside shoulder. 

Officials are asking drivers to be patient and stay off your phones.