A 51-year-old woman is dead after a motorcycle crash on the Toronto-bound lanes of the Burlington Skyway Monday morning.

The OPP confirmed that the woman was killed after a crash involving a truck, a minivan, two cars and her motorcycle just before the morning rush hour, around 5:55 a.m.

In an online video from the scene, Sgt. Kerry Schmidt said the motorcycle she was riding was coming through traffic as cars were beginning to slow down, and there was some contact between motorcycle and one of the cars. 

Then, he said, things escalated into a "multi-vehicle, chain reaction event where the motorcyclist was struck significantly, sustaining fatal injuries."

"As a motorcyclist you're vulnerable to injury if you're involved in a wreck, and sadly, it ended up that way again this morning," Schmidt said. 

He also said from the scene that there have been 37 motorcycle fatalities in Ontario this year. "With this one this morning, we've now surpassed the number of motorcycle fatalities that we've seen in over a decade," he said.

Traffic was snarled for hours because of a police road closure, but the lanes reopened around noon, the OPP says.

Things became so bad that traffic backed up throughout central Hamilton, as people searched for alternate routes: