Lambton County

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Road Closure Graphic The following temporary closures and detours on County Roads are required due to seasonal construction. Motorists are advised to follow the appropriate detour routes around areas. Your patience and cooperation are appreciated.

Although this list is intended to be comprehensive, unavoidable emergency closures and minor closures are not listed.  Be sure to check back for updates.


County Road 4 (Petrolia Line) (within the Town of Petrolia) between Fletcher Street and Kerby Street. Work expected to be completed in November 2016. Detour route posted.

County Road 22 (London Line) will be reduced to a single lane in each direction in the vicinity of the Telfer Creek Bridge which lies between Blackwell Sideroad and County Road 23 (Airport Road) to allow for the rehabilitation of the Telfer Creek Bridge.  The bridge is located approximately 195 metres east of Blackwell Road. Work is expected to last 12-14 weeks, weather permitting. (commencing Monday July 11, 2016)