Here are key roads that the Sonoma County Transportation and Public Works Department plans to work on this week. In each case it warns of possible traffic delays because of one-way traffic controls and suggests using alternate routes.

–Bloomfield Road, from Valley Ford to Canfield roads, for ditch work from today through Aug. 12, weekdays.

–Middle Two Rock Road for brush cutting today.

–Petrified Forest Road, from the Napa County line to Porter Creek Road, for fix-up resurfacing work.

–Porter Creek Road at the Mark West Springs Quarry for installation of a drainage culvert, today and Thursday.

–River Road, from Mirabel Road to Scenic Drive, for fix-up resurfacing on Thursday.

–Salmon Creek road for brush cutting today.

–Westside Road, from River to Wohler roads, for brush cutting today.

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