From an HRM press release: 

On Monday, July 22 road construction will take place on the Old Sambro Road from Northwest Arm Drive to Dentith Road, weather permitting.

During this work, the lights will be shut down at the intersection of Northwest Arm Drive in the morning and the lights at the intersection of  Dentith Road  will be shut down in the afternoon.  Traffic Control Personnel will be in place at each location during the shutdowns.  Motorists should expect delays. 

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This is not the first construction on the stretch. I’ve been trying for a couple weeks now to avoid the potholes and gigantic gravel pits. Motorcycles, beware.