Sonoma County’s road department plans road work that likely will cause some traffic delays on the following roads this week:

–Alexander Valley Road, from Healdsburg Avenue to Highway 128, from Monday through Friday.

–Arnold Drive at Agua Caliente Road, Wednesday and Thursday.

–Bohemian Highway at the bridge over the Russian River for bridge construction, through Friday.

–Calistoga Road, from Porter Creek Road to Santa Rosa, for brush cutting, Tuesday and Wednesday.

–Mark West Springs Road at Mark West Springs Lodge, Monday and Tuesday.

In each of these cases, the county says one lane will be closed and alternative routes are recommended.