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Construction on Highway 101 in Petaluma will involve some closures this week:

Highway 101 and Highway 116:

Demolition continues for the northbound U.S. 101 bridge over State Route 116/Lakeville Highway. Caltrans is scheduling night work over State Route 116 from Feb. 6 through Feb. 8.  Due to traffic on SR 116, the roadway will be closed and the demolition will take place at night.

Closure Schedule:

Thursday night, Feb. 6 to Friday morning, Feb. 7

  • Eastbound SR 116 will be closed from 10 p.m. to 5 a.m.
  • Westbound SR 116 will be closed from 10 p.m. to 5 a.m.

Friday night, Feb. 7 to Saturday morning, Feb. 8, and Saturday night, Feb. 8 to Sunday morning, Feb. 9

  • Eastbound SR 116 will be closed from 10 p.m. to 6 a.m.
  • Westbound SR 116 will be closed from 11 p.m. to 6 a.m.

Traffic may detour to Caulfield Lane and S. McDowell Boulevard.

Highway 101 and Old Redwood Highway:

Caltrans has scheduled lane, ramp, and full freeway closures associated with the Old Redwood Highway Interchange project in Petaluma.

Northbound U.S. 101 Ramp Closure:

Feb. 7, Caltrans will switch traffic to the new bridge at Old Redwood Highway/Petaluma Boulevard North Interchange and close the old bridge.  When this new bridge is opened, the northbound diagonal on-ramp from westbound Old Redwood Highway will be closed for approximately four to six months.  This closure is necessary to build a new on-ramp that will connect to the realigned roadway.

  • During this on-ramp closure, westbound traffic on Old Redwood Highway will turn left at a temporary traffic signal and use the existing northbound U.S. 101 loop on-ramp.
  • Eastbound traffic will use the existing loop on-ramp to travel north on U.S. 101.
  • One lane will remain open in each direction for through traffic.
  • This ramp closure is expected to cause delays and additional time should be allowed when traveling through the area.

Southbound U.S. 101 Ramp Closure:

The southbound diagonal on-ramp from Petaluma Boulevard North to U.S. 101 is also scheduled to be closed on Friday night, Feb. 7. This ramp will be closed from four to six months while Caltrans builds a new on-ramp to connect to the realigned roadway.

  • During this on-ramp closure, eastbound traffic on Petaluma Blvd. North will turn left at a traffic signal and use the existing northbound U.S. 101 loop on-ramp.
  • Westbound traffic from Old Redwood Highway will continue to use the existing loop on-ramp to travel to southbound U.S. 101.
  • One lane will remain open in each direction for through traffic.
  • This ramp closure is expected to cause delays and additional time should be allowed when traveling through the area.

Elsewhere in Sonoma County:

  • Changes in traffic controls will occur this week at the Porter Creek Road bridge replacement project. Beginning this week and continuing for the next few weeks the contractor will be doing bridge deck construction. Traffic will be reduced to one lane controls all day, 7 a.m. to 7 p.m. Monday through Friday with up to 20 minute delays.
  • Guardrail repairs on Occidental Road between High School Road and Highway 116 will conclude today, and beginning tomorrow the crew will begin guardrail repairs along Stony Point Road at Todd Road. The bridge crew will also be making repairs this week to a failing retaining wall on Middle Terrace Road in Monte Rio.
  • Cal Fire crews will be assisting county road personal with tree limb and brush removal along Burnside Road and Stewarts Point Skaggs Springs Road, on Tuesday and Wednesday this week.

Lake County:

  • Route 29 – PG&E of Ukiah has been issued a Caltrans Encroachment permit for utility repairs 0.4 mile south of Konocti Forestry Camp on Feb. 4.  Work hours are 10 a.m. to 2 p.m.  One-way traffic control will be in effect.  Motorists should anticipate 5-minute delays.
  • Route 175 – AT&T of Santa Rosa has been issued a Caltrans Encroachment permit for utility repairs from the Cobb Post Office to Anderson Springs Road.  Work hours are 9 a.m. to 4 p.m., weekdays.  One-way traffic control will be in effect.  Motorists should anticipate 10-minute delays.

Mendocino County:

  • Route 1 – Replacement of the Greenwood Creek Bridge will continue.  One-way traffic control with a temporary signal will be in effect 24 hours per day, 7 days per week.  Motorists should anticipate 5-minute delays.
  • Route 1 – Replacement of a culvert with a bridge at Dunn Creek will continue.  One-way traffic control with a temporary signal will be in effect 24 hours per day, 7 days per week.  Motorists should anticipate 5-minute delays.
  • Route 101 – Caltrans will perform slide repairs near the Korean War Veterans Memorial Bridge (near Frog Woman Rock).  Northbound traffic will be restricted to one lane 24 hours per day, 7 days per week.  Motorists may experience minor traffic slowdowns.
  • Route 101 – Bridge rehabilitation at the “green” Russian River Bridge will continue.  Work hours are 8 a.m. to 4 p.m., weekdays.  One way traffic control will be in effect.  Motorists should anticipate 15-minute delays.
  • Route 253 – PG&E of Ukiah has been issued a Caltrans Encroachment permit for tree trimming from Slide Creek to the junction of Routes 101/253 beginning Feb. 3.  Work hours are 8 a.m. to 4 p.m., weekdays.  One-way traffic control will be in effect.  Motorists should anticipate 5-minute delays.
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