The "Oversize Load" signs seem like an understatement.
A 400-foot long transport and its192 wheels rolled into Riverside County Thursday. It's carrying a low-level radioactive steam generator from the San Onofre Nuclear Generating Station.
Wes Farr has been following the truck online, using twitter updates, for about four days. He didn't miss an opportunity to see it in person when the football field-size truck arrived overnight in the Temecula area.
"It's one of the most incredible things I've ever seen," said Farr. "The only thing I saw better than this was the space shuttle flying on a 747. It just made a turn that was unbelievable. It's just amazing what man can do."
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That turn early Thursday morning took about 35 minutes. Refresh this page for video at about noon.
The truck was parked Thursday near Winchester and Margarita roads in Temecula.
It will continue through San Bernardino County and on to a plant in Utah. The truck will only travel at night and at speeds up to 25 mph, so the trip to Utah is expected to take about three weeks.
Once there, it will be disassembled into seven sections and shipped back to San Onofre, where it will be put back together for another haul.
The generators -- there are four that need to be moved -- weigh 700,000 pounds.
Although the truck's route has not been made public because of its sensitive cargo, it's tough to miss the behemoth. As it rumbled out of San Diego County this week, the truck was twice parked alongside two North County roads, temporarily blocking traffic lanes and creating a gigantic roadside curiosity.
On Monday, it was parked on the eastside of Oceanside Boulevard, just east of El Camino Real, according to Oceanside police. On Tuesday, it was parked in the middle of West Mission Road, near North Andreasen Drive in Escondido.
Southern California Edison replaced the generators with new steam generators after microscopic cracks developed in some of the internal plumbing. The generators help convert the heat created by nuclear fission into steam. That process spins a plant's electricity generating turbines.
As for the radiation levels, officials said a person would have to stand by the truck for an hour to receive about the same amount of radiation exposure as they would from a dental X-ray.