Trains careening down mountainsides, unable to stop. Passenger cars separating from a manned train. Freight cars rolling across the Canada-U.S. border.

In the past 13 years, there have been 459 cases of so-called runaway rolling stock, hundreds more than previously thought.

Following the Lac Megantic tragedy — when an insufficiently secured, parked train ran down a hill and exploded, killing 47 people — it was widely reported that there were about a dozen incidents of runaways a year.

But in fact that only counts examples where an uncontrolled train rolling down the track was the main issue, not when it led to larger problems like derailments and collisions, such as in Lac Megantic.

Explore the map below to see all runaway-related incidents and accidents reported to the Transportation Safety Board from 2000 until 2012.

Search by your community, by train operator or by train type.

If a community has more than one case,, brief summaries of all those incidents will be displayed below. Click on any one of them to read the details.