If there would be a chart of suicide methods how high would suicide by train be in terms of efficency and quick death?

It's relatively inefficient because thousands of passengers can be delayed for hours for just one death.

First of all to jump on the tracks in front of a train really traumatizes the train engineer. Doing that to a person is disgusting. Getting hit by a train doesn't always kill you and is very painful.

There could never be such a chart, because it would have to be based on first hand accounts, and people who commit suicide dont have much to say on the matter afterwards