I revisited this old article from 2009 today. It concerned a Facebook page dedicated to bringing improvements to an intersection on Vancouver Island that frequently sees major collisions. Dividing the highway, adding concrete barriers, prohibiting turns, reducing the speed limit, installing traffic lights and other similar suggestions make up the majority of the solutions put forward by concerned people whenever events like these occur.
One component of Vision Zero (our current road safety strategy) is highway design. The concept is that if road users fail to follow rules due to lack of knowledge, approval or ability, or if injuries do occur, then system designers are responsible for taking further action to prevent people from being killed or seriously injured.
Implementation of median barriers, modern roundabouts, speed humps, pedestrian islands, curb extensions along with enforcement methods such as the installation of speed and red light cameras that make car travel safer must be considered.