Alcohol, speed and weather 'are not considered factors'
A bus rollover that sent four oil-and-gas workers to hospital in life-threatening condition is drawing attention to the safety risks associated with transporting crews to and from worksites, an issue of direct concern to occupational health and safety (OHS) professionals across Canada.
The incident occurred around 7 a.m. on Wednesday on Highway 672, also known as Emerson Trail, northwest of Grande Prairie, Alta. According to CTV News, the bus had 17 passengers when it rolled on a northwestern Alberta highway Wednesday morning.
The incident took place near Beaverlodge, in a region commonly used as a corridor for industrial traffic and worker transportation linked to the energy sector.
The passengers were oil-and-gas workers headed to Grande Prairie at the time of the crash, according to the report. Their departure location has not been confirmed. Authorities have not released the name of the employer, the bus operator or details about the nature of the work the passengers were scheduled to perform.
Emergency response and injuries
RCMP said emergency responders treated passengers for both serious and minor injuries at the scene following the rollover. Local fire services, paramedics and police attended, with crews working along the highway to assess and stabilise the injured. Images published by CTV News show multiple emergency vehicles positioned on Highway 672 as responders managed the incident.
STARS Air Ambulance was called in to assist, and a medical helicopter landed on the highway near Beaverlodge. Photographs from the scene show a STARS helicopter, ambulances and fire fighters on the roadway, underscoring the severity of the collision and the need for rapid transport of patients to hospital.
Acute Care Alberta told CTV News that four of the passengers were taken to hospital with life-threatening injuries, while the remaining 13 suffered non-life-threatening injuries. The identities of the injured workers have not been released, and no further updates on their conditions were immediately available. Authorities have also not specified which medical facilities received the patients.
Photo is from The Canadian Press (CP)
Preliminary findings and road closure
RCMP officers at the scene told CTV News the bus veered off the road into the ditch and then flipped back onto the road as it rolled. The vehicle came to rest on Highway 672, leaving debris along the route and prompting a full closure of the affected section. Investigators documented the scene and examined the bus as part of the collision investigation.
Police said alcohol, speed and weather “are not considered factors” in the crash at this stage, according to CTV News. No information has been released about possible mechanical issues, road surface conditions at the time of the incident or other potential contributing factors. The investigation remains ongoing, and no charges have been announced.
Highway 672 was closed between Range Roads 90 and 92 following the rollover to allow first responders to work and investigators to conduct their examination. Traffic was diverted while the bus and debris were removed from the site.
No further details are available as of the writing of this story.
The table below is compiled from publicly reported individual incidents of some bus rollover incidents covering roughly the past 5 years (mid-2020 through May 2026):
