Dozens of pigs that blocked a Toronto highway ramp Monday morning have been rounded up and removed from the road.

Ontario Provincial Police Const. Graham Williamson told CTV News that one lane at the crash scene is open, and crews are working to repair a damaged guardrail.

The pigs were dropped on Highway 427's southbound express ramp to the eastbound Gardiner Expressway when the tractor trailer carrying them flipped over around 4:25 a.m.

Commuters had been using the collector's ramp as police continue to clear the scene of the crash.

About 50 of the 250 pigs on board got loose. The Ontario Society for the Prevention of Cruelty to Animals confirmed Monday afternoon that 81 pigs died in the crash and seven more were put down as a result of their injuries.

Rounding up the escaped hogs took almost eight hours. Firefighters used ladders to build a makeshift corral. The pigs did not go willingly onto a second truck.

"You're dealing with live animals. They have feelings of fear, of course. They're extremely stressed out by the entire operation, the procedure, the actual incident," Williamson said.

The Canadian Food Inspection Agency will examine the surviving pigs in the next 24 hours to determine whether they're still fit for slaughter. The pigs were headed for the abattoir when the accident occurred.

The truck driver, a 26-year-old from Norwich, Ont., wasn't injured. He has been charged with careless driving. He wasn't injured in the crash.

With files from The Canadian Press