The lane will be open starting at Montreal Road from 3 p.m. to 8 p.m. every day, as well as a brief detour into the westbound lanes around the construction site near Jeanne D'Arc.
The city is also putting extra buses on the road and increasing park-and-ride spaces at the Trim Road station.
Crews are working around the clock to fix the sinkhole, which opened suddenly at the Jeanne d'Arc Boulevard exit amid heavy rains in the region Sept. 4.
One driver accidentally drove his car into the hole, but escaped with cuts and bruises. His car was pulled out several days later.
By Sept. 30, Mayor Jim Watson is asking for an inspection of all infrastructure located along "critical" city roads, and an independent investigation on what caused the Highway 174 failure is due in 90 days.
If faults are found during the inspection, repairs will be made immediately, the city stated.
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