Main-track derailment
Canadian National Railway Company
Joliette Subdivision
near L’Assomption, Quebec
The occurrence
On , a Canadian National Railway Company train was proceeding Southward on the Joliette Subdivision when it went into emergency near L’Assomption, Quebec. A follow-up crew inspection found 13 cars had derailed. No injuries or spills were reported.
Media materials
News release
Investigation report: April 2019 Main-track derailment near L’Assomption
Read the news release
Deployment notice
TSB deploys a team of investigators to the site of a train derailment near L’Assomption, Quebec
The Transportation Safety Board of Canada (TSB) is deploying a team of investigators to the site of a Canadian National Railway train derailment near L’Assomption, Quebec. The TSB will gather information and assess the occurrence
Investigation information
R19D0065
Main-track derailment
Canadian National Railway Company
Joliette Subdivision
near L’Assomption, Quebec
Investigator-in-charge
Luc Régis joined the Transportation Safety Board of Canada (TSB) in 2019 as a Senior Regional Investigator with the Rail/Pipeline Investigations Branch.
Before joining the TSB, Mr. Régis gained considerable experience in the construction and maintenance of railway infrastructure, holding various supervisory positions within the Engineering Department at Canadian National Railway Company (CN) from 2009 to 2014. From 2014 to 2019, he worked at Transport Canada as a Railway Safety Inspector in the Quebec Region, and at Transport Canada’s Emergency Situation Centre (SitCen) as rail safety expert. He lives in Montreal, Quebec.
Download high-resolution photos from the TSB Flickr page.
Class of investigation
This is a class 4 investigation. These investigations are limited in scope, and while the final reports may contain limited analysis, they do not contain findings or recommendations. Class 4 investigations are generally completed within 220 days. For more information, see the Policy on Occurrence Classification.
TSB investigation process
There are 3 phases to a TSB investigation
- Field phase: a team of investigators examines the occurrence site and wreckage, interviews witnesses and collects pertinent information.
- Examination and analysis phase: the TSB reviews pertinent records, tests components of the wreckage in the lab, determines the sequence of events and identifies safety deficiencies. When safety deficiencies are suspected or confirmed, the TSB advises the appropriate authority without waiting until publication of the final report.
- Report phase: a confidential draft report is approved by the Board and sent to persons and corporations who are directly concerned by the report. They then have the opportunity to dispute or correct information they believe to be incorrect. The Board considers all representations before approving the final report, which is subsequently released to the public.
For more information, see our Investigation process page.
The TSB is an independent agency that investigates air, marine, pipeline, and rail transportation occurrences. Its sole aim is the advancement of transportation safety. It is not the function of the Board to assign fault or determine civil or criminal liability.