From Postmedia News via the
There was a terrible head on collision on Highway 63 outside Fort McMurray last Friday that killed seven people. That brings the road's total to 46 people over the past 5 years. The basic issue appears to be that there is too much traffic travelling on the two lane highway. The population exploded and both individual autos and trucks carrying loads for industry use it more heavily than was planned for. Despite this there have apparently been issues getting the funds to twin the road.
In this article the national post interviews the area's MLA on the topic.