Almost all accidents are because someone is driving at a speed where they cannot stop within their sightline.
Everytime someone gets injured on a section of road, the speed limit should be dropped by 10mph, and the sign should make it clear that it is because of accidents. Eventually really bad spots would be at 10mph.
Think of how much money this would save the authorities, no need to improve roads, just cut the speed limit. The only cost would be the sacrifice of a few cyclists and nobody cares about them anyway, or there would be prosecutions and jail sentences for random killing.