First there is the history behind the crossing, how many accidents. There's the cross-product of vehicles and trains; whether something happened recently; the number of complaints we receive; if for whatever reason there has been a lot of urban development around a crossing where there was no history three years ago and now it's becoming more problematic. As well, we'll do a risk assessment of the crossings and we'll determine which ones should be dealt with first. That's how we determine the list.
So far, statistics have shown that for the crossings that were improved, accidents went down by more than 80%, so it's pretty effective.