The source is a study that was done by Transport Canada, where they calculated the number of deaths and injuries; there was a cost value to that. Then we took that cost value and estimated if there was a 20% savings of lives and injuries, what value that would bring back. It looked at loss of life, the system, hospital care. It was a comprehensive evaluation of estimating that loss.
On September 25th, 2017. See this statement in context.