BOSTON (CBS) — A deadly tractor-trailer crash brought the Massachusetts Turnpike to a standstill for hours Monday afternoon.

A tractor-trailer rolled over on the Mass. Pike in Brighton (WBZ-TV)

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State Police said the truck was traveling eastbound in Brighton around 1:30 p.m. when “the trailer began to sway and the truck moved from the middle lane to the left lane.”

“For reason or reasons still under investigation, the truck then rolled over onto the cement median barrier and continue to travel along it for a significant distance,” State Police said in a statement late Monday night.

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The cab landed on the eastbound side and the trailer rolled over onto the westbound lanes.  The large container being carried on the trailer also ended up across three lanes on the westbound side of the Pike.

The driver of the tractor-trailer was pronounced dead at the scene. He was later identified as 49-year-old Sterling Hullett of Fort Worth, Texas. He worked for R and D Transportation in Westport.

The rollover on the Mass Pike (WBZ-TV)

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No other cars or trucks were involved, but the crash created a bottle neck in the afternoon commute.