Transport Quebec has wrapped up its work inspecting the Henri-Bourassa overpass above the Trans-Canada highway which shed a chunk of concrete Monday afternoon.
The transport department's preliminary assessment suggests water infiltration was what caused the sliver of concrete tumbling down onto the roadway which dented the hood of a passing car.
Transport Quebec engineers have now begun inspecting 500 other structures across the province — nearly a tenth of the 5,294 transportation-related structures under the department's control.
About 100 of those structures are on the island of Montreal. They'll be inspected before the end of the week.
Transport Quebec spokesperson Caroline Larose says the inspections by binocular- and clipboard-wielding engineers are visual inspections only.
"They'll take notes, they'll take pictures," Larose says. "After that they'll send the report back to the office, they'll be looked at, and if there's a need for securtization to get some loose concrete off, then we will come and do that."
The transport department will make the list of at-risk overpasses complete one the inspections are done.