This is horrific to be sure and underscores simply that cars and bikes just won't work together, simple physics. I have seen people write for years in forums about deaths and bikes vs cars, blaming drivers and also blaming current laws and politicans, etc. However I just don't believe you can regulate this problem because of human behavior and the simple law of physics. The only answer is to completely seperate the two like other countries have done. 7 deaths on bikes by a car is unprecendented, I can't even remember anywhere near this many riders getting killed all at once. It's a tremendous tragedy for the families of these riders and really underscores that bikes and cars need to be seperated completely from each other.