A woman who died after a truck allegedly failed to stop at a red light and crashed into the back of her motorcycle was a policewoman on her way to work.

The officer, who worked in the north western metro region, was on her motorcycle, travelling west on Boronia Road, Wantirna, when she stopped at a traffic light shortly before 9am.

Emergency services work to free the woman from underneath the truck, January 12, 2017. Credit:Channel 9

A truck, also travelling west, allegedly failed to stop at the red light and ploughed into the motorcycle, trapping the woman under the vehicle.

Emergency services worked to free the woman from underneath the truck, but she died at the scene.