Dunedin City Council senior contract supervisor Peter Hughes said a temporary 50kmh zone and road surface warning signs were put in place while road safety planners investigated long-term solutions to the slippery road problem, such as resealing the area with high-friction slurry.
Several regular users of the road contacted the Otago Daily Times yesterday, questioning claims by council staff on Monday that diesel or contamination of the road surface caused the crashes.
A Dunedin man, who did not want to be named, who drives to work near Mosgiel, said the section of road where four cars crashed on Monday and four crashed last week, was "lethal after rain".
"Council's putting its head in the sand. If it's been a diesel spill, then it's been there for 20 years. They resealed it a few years ago and, even when it was gritted, you could feel the corner was still wrong at low speed."
Crash statistics represented a "minuscule" proportion of incidents and there had been "tens if not hundreds" of unreported crashes in the area in recent years, he said.
At 7.20am on Monday, he assisted painting contractors whose van had gone out of control there and saw another van crash on Monday night.
A North Taieri resident said his son had stopped to give assistance in an area where several vehicles had left the road on Monday, and was "almost cleaned up" by a woman driving through the scene at open road speed.
Mark Paterson, of Dunedin, who travels to work over the road, attributed the slippery conditions to a road surface which sweated in hot weather, and to "humps" in the middle of the corners.
"It amazes me the real problems, the large humps in the middle of both corners, are not obvious to the experts. There will be at least one accident every time it rains.
"It's absolute carnage and no-one's doing anything about it. Someone will die there . . ."
He had crashed on the corner himself, despite "tiptoeing" around the bend.
"I was going downhill at 70kmh, hardly excessive under the conditions, the car lost traction without any warning, flicked sideways and only by sheer luck did I end up in the undergrowth on the outside of the corner, rather than entangled with the two oncoming cars."
