Bulls Bridge. Photo/file
A piece of steel about the size of "two toilet seats" created "bloody mayhem" on Bulls Bridge late Wednesday night.
About six vehicles were damaged in separate incidents when they hit the object, which was in the middle of one lane, near the southern end of the bridge on SH1,
Bulls fire chief Brian Carter said.
Nobody was injured and none of the vehicles crashed.
"It was a big piece of steel. It might have been moved around. The car just hit it, bang, he didn't see it. Then all the air bags in the car deployed with that bang."
The car was a type that shut down automatically if there was a collision.