The death of a woman in Brampton marks the fourth pedestrian fatality on GTA roads over the last 24 hours.

According to Peel Regional Police, the woman was crossing Queen Street near Kennedy Road at around 6:45 a.m. when she was struck by a transit bus.

She died at the scene.

Her age has not been officially released, but police said they believe she is an adult.

Area residents tell CTV News Toronto they believe the victim had been staying at a nearby hotel. She was reportedly heard loudly arguing with someone hours before the incident.

“Running across the street and the bus had the green light so they were coming through. She kind of hesitated like she was going to stop and then, as the bus came, that’s when she moved forward,” one witness said.

The area was closed for about four hours to accommodate an investigation, which Peel police’s major collision bureau is conducting.

Const. Iryana Yashnyk said police would like to hear from anyone with dash camera footage of the area.

"We are asking any witnesses to come forward and speak with police," she said.

Yesterday, separate collisions across the GTA claimed the lives of three pedestrians.

A 79-year-old woman was struck and killed by a truck on Minotola Avenue in Mississauga, in the afternoon. Police believe the victim was walking along the curb at the time of the crash.

Hours later, at Midland Avenue in Scarborough, a 57-year-old man was struck and killed.

The victim was trying to cross mid-block, Toronto police said, and died at the scene.

“I thought there was an explosion or something,” one witness told CTV News Toronto. “I turned around and I saw this guy was lying on the street.”

About fifteen minutes later in Mississauga, a similar scene unfolded near Dundas Street West and Erindale Station.

A 63-year-old woman attempted to cross the street when she was struck and killed by a westbound vehicle.

In this case, Peel police say they are still trying to determine whether the woman was crossing mid-block or at a posted intersection.

Another pedestrian was struck in Peel Region on Wednesday morning near Dixie Road and Shawson Drive in Mississauga. The victim, police say, sustained serious but non-life-threatening injuries and the vehicle involved did not remain at the scene. The vehicle involved has been described as a light brown tractor unit with a white trailer.

“We know that a lot of these are preventable through reductions of speed, eliminating distractions, aggressive driving,” Toronto police Sgt. Brett Moore said. “All those things are critical to improving road safety, so definitely the numbers we see are concerning.”

So far this year in Toronto, there have been 63 traffic fatalities compared to 56 this time in 2017.