Ottawa's deadly bus crash

On Sept. 18 at 8:48 a.m. ET, anOC Transpodouble-decker bus travelling Route 76 north from Barrhaven to downtown Ottawa crossed a level rail crossing and struckVia Rail passenger train 51 travelling west.

In the resulting collisionthe front end of the bus sheared off,six people were killedand more than 30 people were injured.

It was an incident that shook the community of Barrhaven, the city of Ottawa and prompted a Transportation Safety Board investigation that is expected to take months to complete.

It also prompted questions about the condition of the bus and its driver and the state of rail safety and rail crossings across the country.

Here is a look at the news stories from the incident, in chronological order:

Sept. 18, 2013

• Ottawa bus-train crash kills 6 in commuting horror
• Via train, Ottawa bus crash: eyewitness accounts
• Via train-bus crash dispatch audio: 'Upgrade this to a mass casualty'
• Bus driver Dave Woodard had clean record before fatal crash
• Level train crossings a high risk for collisions, TSB warns
• Ottawa bus crash with Via train recounted on social media

Sept. 19, 2013

• Ottawa bus in deadly crash moved from scene
• Ottawa bus crash: Key locations
• Ottawa bus crash: How safe are train level crossings?
• 5 Ottawa bus-crash leads investigators could look at

Sept. 20, 2013

• Ottawa level crossing gate down 25 seconds before crash
• Bus crash victims a microcosm of 'official' Ottawa
• Ottawa bus crash highlights lack of black-box rules

Sept. 23, 2013

• Ottawa bus crash: 1st funeral held for victim Connor Boyd

Sept. 24, 2013

• Psychologists to talk trauma after bus-train crash

Sept. 26, 2013

• Remembering victims Karen Krzyzewski, Rob More, Kyle Nash