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The Utah Transit Authority is investigating why the crossing gates were in an upward position at an intersection where a FrontRunner train hit and tore apart a FedEx cargo semitruck on Saturday.

Police dashcam video of the crash in North Salt Lake shows the gates were up and the flashing lights and bells were not activated when the train struck the truck, UTA said in a Tuesday news release.

When there is a power outage or lack of signal, the release says, crossing gates are programmed to default to the "down and active" position as a safety precaution.

The gates at the intersection, about 1100 North and 100 East, had been affected by severe ice and snow conditions that day and had successfully defaulted to the "down and active" position, the release says. But after an employee arrived at the location, the gates moved to the upward position and remained up as the crash occurred.

"The agency has never had an accident like this before, and UTA is investigating why and how it happened to ensure it doesn't occur again," the release says.

UTA has initiated an investigation of all systems and is conducting interviews with employees to identify whether all protocols and procedures were properly followed to determine the cause of the incident and whether human error was a factor, the release says.

Safety oversight agencies and officials have been notified and are monitoring UTA's investigation, the release says, and once the investigation is concluded, "all appropriate actions will be implemented to prevent this from happening in the future."

There were no serious injuries in the crash, the release said.

Safety is the agency's "top priority," the release said, and UTA is "committed to a thorough and accurate review of this incident to ensure we are providing a safe transit system to our customers."

Reporter Taylor W. Anderson contributed to this story.

Twitter: @mnoblenews