A flurry of new road projects join those already underway in Sonoma County this week. Watch for state crews to start extensive projects on Highways 12 and 121 in the Carneros region, and county crews to start repaving the final unimproved stretch of Petaluma Hill Road between Petaluma and Cotati.

Also this week, a few rural roads get long needed rehabs, and Porter Creek Road closes Wednesday night while bridge girders are delivered.

Sonoma — State contractors will spend the next few months repairing the roadway, removing old pavement and repaving Broadway (Highway 12) from Napa Road south to the Carneros Highway (Highway 121) and Arnold Drive from Stage Gulch Road (Highway 116) to Sears Point (Highway 37). Most of the work on Broadway will be done between 6 p.m. and 8 a.m., with one lane closures. Work on Arnold Drive will be 9 p.m.-5 a.m. Monday through Friday. More info: dot.ca.gov/dist4 or 781-2245.

County crews continue sidewalk and lighting construction on the Arnold Drive roundabout at Agua Caliente Road 7 a.m.-5 p.m. Monday – Friday, with up to 15 minute delays.

Rohnert Park — Grinding and paving begins on Roberts Lake Road between Santa Rosa Avenue and the Rohnert Park city limits. Expect considerable traffic delays 7 a.m. to 4:30 p.m.

Crews will make pavement repairs on Petaluma Hill Road from Adobe Road to E. Cotati Ave. and prepare for overlay. PG&E will finish work on gas lines early this week. Pavement work begins 7 a.m.-5 p.m. Wednesday and Thursday, with 20 minute delays.

Pavement repairs, crack seal and signal loop repairs continue at Stony Point Road from the Rohnert Park Expressway to Santa Rosa city limits Monday, with work 7 a.m.-5 p.m. causing 20 minute delays.

The lower end of Lichau Road off Roberts Road is being rebuilt this week, with dump trucks hauling in base rock to construct the upper level of road base. Expect traffic delays due to trucks, grading and compacting equipment.

Penngrove — Main Street will be repaved, so expect prep work 7 a.m.-5 p.m. Monday through Friday, with 20 minute delay.

Kenwood — Cal Fire and the Sonoma crew will be cutting brush on Lawndale Road Tuesday and Wednesday. One lane traffic controls both days.

Healdsburg — The Bridge crew continues working on West Dry Creek Road west of Healdsburg, completing cleanup after two cross pipe replacements, and beginning the replacement of a third culvert. Also on West Dry Creek Road, Cal Fire and the Healdsburg road crew will be doing roadside brush removal on Tuesday. One lane traffic controls will be in place for both locations.

Porter Creek Road will be closed from 7 p.m. Wednesday through 7 a.m. Thursday while contractors deliver pre-cast girders to the project. There will be a moving road closure on Mark West Springs Road beginning around 7 p.m. for the four girders to be moved up the road from Hwy 101. Porter Creek Road will be closed at Franz Valley Road through the night while the girders are being set. Overhead power will also be shut off on the south side of the bridge for safety reasons while cranes are moving the girders into place. The road is expected to reopen around 7 a.m. Thursday.

The Porter Creek Road bridge replacement continues with construction of the new bridge abutments 7 a.m.-7 p.m. Monday-Friday with up to 20 minute delays.

Santa Rosa — Striping continues on Calistoga Road between Plum Ranch and Porter Creek roads from 7 a.m.-5 p.m. Wednesday through Friday, with moving lane closures and 30 minute delays.

City crews continue work at the intersection of Mendocino Avenue and Bicentennial Way, with lane closures snarling traffic between 8:30 a.m. and 4:30 p.m. weekdays. The project will add new right turn lanes but involves excavating for an underground traffic signal and street light conduit. That work is complicated by its close proximity to existing gas, electric, water and communication facilities, city traffic engineer Steve Dittmer said.  After that work is done, the new turn lanes will be excavated and paved, with the final paving done at night. Expect it to be done in September.

A new traffic light was activated at the intersection of Thomas Lake Harris and Fountaingrove Parkway on Aug. 7.

On Fulton Road between the Santa Rosa city limits and Highway 101, signal loops are being reconstructed and pavement will be poured 7 a.m.-5 p.m. Monday through Friday, with 30 minute delays.

Striping continues on Burbank Avenue in Roseland, with moving lane closures 7 a.m. to 5 p.m. and up to 10 minute delays.

West County — Pavement repairs will be made in preparation for an overlay on Bodega Highway between Jonive Road and Highway 1 from 7 1.m.-5 p.m. Monday – Friday, with up to 20 minute delays.Work is expected to end on Aug. 26, with striping Sept. 10-23.

Pavement repairs also will be made to Valley Ford Road between Highway 1 and Tomales Road, between 7 a.m. and 5 p.m. Monday through Friday. Work is expected to end Aug. 30, with striping Sept. 10-23.

Grinding and paving work continues Monday and Tuesday on Main Street in Monte Rio, creating considerable traffic delays 7 a.m.-4:30 p.m.