people are the problem
Add more signs, and more signs will be ignored. The people who cause these accidents do not pay attention to signs. The curve on our road is simple enough to be negotiated by a first-time driver. Unfortunately, it is not the road but the drivers that are unsafe. There will always be accidents there. That is a sad fact but does not mean there is anything wrong with the road or the signage.
Add more signs, and more signs will be ignored. The people who cause these accidents do not pay attention to signs. The curve on our road is simple enough to be negotiated by a first-time driver. Unfortunately, it is not the road but the drivers that are unsafe. There will always be accidents there. That is a sad fact but does not mean there is anything wrong with the road or the signage.