Image copyright Getty Images Image caption But the road has just re-opened after months
Three car and two motorbike accidents happened in the Toronto street where a plate-less, lane-closed road has been left in place since mid-July.
Autopsies were carried out after several of the victims died, but their reasons for the crashes are not clear.
Toronto Public Works says it is not able to decide what to do about the road, which has caused traffic jams.
However, Toronto’s transit agency says it stopped using the road after about 12 months because of safety concerns.
The road had been blocked so cars could not drive onto the northbound carriageway where the crashes took place. It is now open once again but all drivers must go around it to reach their destination.
Emma Fynes is one of the people whose cars were involved in an accident near the Toronto intersection of Spadina Avenue and University Avenue on 8 July 2017.
She told BBC News she had no idea how or why the road had been closed for months.
“I had to duck between cars trying to get through,” she said.
“It was so chaotic … It’s just not fair to other drivers on that road either.”
Image copyright Aaron Bartman Image caption Aaron Bartman posted this photo on Facebook, showing a northbound stretch of road surrounded by cones and police tape
The delay in closing the road may have been caused by a legal issue, as it had been built without markings and wordings on the permanent highway signs, Toronto Public Works said.
“Due to unforeseen circumstances, we learned that the construction rules do not require markings or indication of the roadway position,” an official said in a statement.
“We have complied with that decision and are currently assessing options for reopening the road.”
However, Detached Commissioner for Toronto’s transit agency told CBC News the road had not been off limits because of safety concerns.
Michael De Jong said his agency stopped using the road in October because of safety concerns, but now again recognises it is needed.
“When the road closed, I guess, for safety reasons,” he said.
“We have since established that there are traffic volumes and speeds of vehicles on that road on a daily basis.
“It would cost too much to do a serious study with the street. It would be pretty risky.”