Each individual case is covered but rarely, if ever considers similar cases. What the Toronto enquiry provided was an overview of all fatal incidents, common affecting factors, etc over a long period. Instead of campaigning based on anecdotal and single event evidence, people were then able to work from meaningful analysis and statistics* for future action. It may seem harsh to say this but there is little value in taking action based on a unique element or factor with a low perceived reoccurence. You're never trying to prevent the death that just happened, only those that might happen in the future.
*I realise that statistics around the loss of life is often uncomfortable territory. We inevitably have an emotional attachment to the face on the accident. However, statistics are good for guiding us on what to campaign for, emotion guides us well in why we're campaigning for it.
I don't have the details to hand, but this has been done. The recommendation was that an interim ban on heavy good vehicles during peak hours should be considered as a priority whilst other measures were discussed.
I can't for the life of me think where I read it or which organisation published it, but it was government led, possibly medical health driven.
http://www.bmj.com/cgi/content/full/308/6943/1534
i'm in the process of updating this report, with a bit of added info. hope that it will be published within the next few months.
i can also help with other statistics if people want...