That's certainly not unique, though the amount of effort put into it will vary. In Germany a typical response to an accident hotspot might be putting up extra signage (e.g. no passing, lower speed limit, Difficult Curves Ahead), adding or moving/changing a traffic light, speedbumps, speed checks etc.

Major, expensive stuff like changing the routing or curvature is pretty rare and most likely to happen if the road is reworked anyway.