The Sonoma County roads department is warning motorists of expected traffic delays this week because of road work on three key roads:

–Arnold Drive, from Madrone Road to Boyes Boulevard, from today through Thursday for repaving. Crews will be grinding off the top 3 to 4 inches of damaged pavement and then putting down fresh asphalt.

–Calistoga Road, from Porter Creek to Plum Ranch roads, today and Tuesday for repaving.

–Westside Road, from River to Wohler roads, Tuesday and Wednesday for brush cutting.

The county Transportation and Public Works Department says one-way traffic controls will be in effect during the work and suggests taking alternate routes if possible.

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