Updated Nov. 27 at 9:50 a.m.
MR 55 is now open in both directions, Greater Sudbury Police reported on their Twitter account.
Updated Nov. 27 at 9:10 a.m.
Greater Sudbury Police have now confirmed that the collision was fatal.
The collision involved a pickup truck and a pedestrian. The pedestrian, a 38-year-old man, has been pronounced deceased. Officers are in the process of notifying the man's family, Greater Sudbury Police said on their Twitter account.
"Our deepest condolences to those impacted by this incident," police said.
One eastbound lane of MR 55 (heading toward Greater Sudbury) is now open. Both westbound lanes (heading toward Copper Cliff) remain closed.
Updated Nov. 27 at 8:15 a.m.
Municipal Road 55 remains closed at this hour as Greater Sudbury Police investigate a single motor vehicle collision.
Police spokesperson Kaitlyn Dunn said one person sustained serious injuries in the collision, which was called in just before 3:45 a.m. Friday.
The collision occurred approximately halfway in between Balsam Street in Copper Cliff and the Big Nickel Mine Road ramp.
The roadway will remain closed "until further notice" as Greater Sudbury Police's Traffic Management Unit investigates.
Municipal Road 55 has been fully shut down in between Balsam Street in Copper Cliff and Big Nickel Mine Road after a serious motor vehicle collision.
Greater Sudbury Police first reported the collision just before 4 a.m. Friday morning, and said it involves "serious personal injury."
Update: All Lanes have been shut down E/B & W/B on MR55 in between Balsam St in Copper Cliff and Big Nickel Mine Rd.— Sudbury Police (@SudburyPolice) November 27, 2020