The westbound lanes of the 403 at Aberdeen have re-opened, almost seven hours after a collision claimed the life of a male motorcyclist.

The re-opening of the highway comes just in time for rush hour on a day marked by chaos and confusion for drivers attempting to travel through Hamilton's west end. 

According to the Ontario Provincial Police, a motorcyclist died in a collision with a truck on the westbound 403 west of Aberdeen Ave. around 8 a.m. 

The male motorcyclist was pronounced dead on scene. 

The age of the male is not yet known, said EMS duty commander James Summers.

The 403 westbound was closed into Thursday afternoon for the cleanup, and re-opened just before 3 p.m. 

The crash caused major delays throughout the day for commuters driving through west Hamilton 

403 crash

This photo of the accident was taken by Zac Black from his car at about 9 a.m. this morning on the 403 in Hamilton. (Zac Black)

Vehicles coming off the 403 created bumper-to-bumper conditions on Main Street West from Longwood Road to west of McMaster University, and on King Street West from west of the 403 to Paradise Road.

The diversions also created headaches for motorists driving in central Hamilton, on James Street South going towards the West 5th Mountain and on Queen Street South.

Dozens of Hamilton took to social media to report the disruptions created by the accidents. 

Around 10 a.m., Twitter user Aaron Stratti said the driving westbound on York Boulevard as a "disaster." Chris Sanislo, a copywriter with JAN Kelley Marketing, said he got stuck driving up the Wilson Street hill in Ancaster, and described the experience as "brutal." 

The delays on the 403 intensified on Thursday afternoon, when a collision in the eastbound lanes near Highway 6 sent two people to hospital, one with life-threatening injuries.

Around 10:30 a.m., a Chevy Aveo rolled over several times after colliding with a transport truck. Paramedics took the Aveo's driver, a male, and a female passenger to hospital.

The driver, the OPP said, had life-threatening injuries, while the passenger suffered serious injuries. 

The truck driver was not injured. 

Two lanes were closed to traffic as of 1 p.m., said OPP Const. Julia McCuaig, but have since re-opened.