AUBURN HILLS (WWJ) – A big mess along I-75 in Oakland County may sound gross — but it’s no danger to public health, according to police.

Northbound I-75 was reduced to two lanes Wednesday near the Chrysler Dr. exit, north of M-59, after a semi truck hauling two trailers carrying an estimated 50 to 55 tons of solid human waste overturned.

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Auburn Hills police said the trailers lost their loads off to the side of the freeway, but stressed that this is “treated human waste,” so it is not a hazardous materials situation.

No one was injured in the crash that occurred at around 10 a.m.

A company has been called in to clean up the spill, police said, but the cleanup will not begin until after the evening rush hour to avoid causing a jam.

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Traffic backups were reported immediately following the accident, but all lanes of the freeway reopened by around 2:30 p.m.

Crew members speaking to WWJ Newsradio 950’s Jon Hewett at the scene said a complete cleanup was expected to take days.

“This is not a quick fix,” Hewett reported. “Whether there is an environmental issues with it is still unclear.”

The waste was headed to a landfill. The cause of the crash remains under investigation.

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Know before you go: Keep it tuned to WWJ Newsradio 950 for the latest forecast during traffic and weather, every 10 minutes on the 8s. See live, local radar at this link; and check for accidents on local freeways here.