It's interesting but not really surprising. The metrics they use are the number of lives saved versus the cost of the measure (minus the productive value of the lives saved).
Bike lanes and red light cameras are the worst performers - because they don't really save lives. I used to actually be against bike lanes because they do not solve the most serious bike/car collision problem, which is inattentive rider/driver at an intersection. They help protect cyclists against "hit from behind mid-block" which is one of the least common incidents. So their direct life-saving ability is negligible. However their value is in the ability of a continuous network to get way more people onto bikes - and then their life saving capacity becomes a difficult to calculate externality that is most certainly not captured in that graph.
Red light cameras' bad performance also does not surprise me - they are expensive and almost always come with the baggage of shorter yellow times which are proven to cause more red light running and more accidents. Municipalities who care about their citizens should increase yellow times and ditch red light cameras.
For some time now I have been arguing for better education. We need to be teaching the entire drivers' handbook to every child in school. It is mind boggling to me that rules of the road education in grade school stops pretty much at "look both ways before crossing and wear a helmet on your bike". And then we let people "challenge" the driver test without requiring them to take a course!? It's more difficult to get a license to operate a forklift in a controlled warehouse environment than it is to drive an 11-tonne greyhound bus sized RV on our public streets -
which you can do with a standard G license that has no legal training requirement, and a test that you can perform in 20 minutes in a smart car that weights 1/10 as much as that motorhome.
Complete training on the provincial laws needs to start in grade school. Everyone needs to understand them whether you are walking, skateboarding, cycling or driving.
And according to this graph, my suspicions are correct: early school training is cheap and effective.