Caltrans Advises Motorists to “Obey the Cone Zone” and Respect One-Way Traffic Control on State Route 116 West of Guerneville, Sonoma County

Sonoma County - Caltrans is issuing an important reminder to all motorists traveling on State Route 116 (SR-116) in western Sonoma County: please slow down, stay patient, and obey temporary traffic signals along the active construction corridor west of Guerneville, between Sheridan Ranch Road and Vacation Beach.

Crews are currently managing multiple roadway and infrastructure improvement projects along this stretch of SR-116. To allow vehicles to travel safely through the narrow work zone, a one-way traffic control system with temporary traffic signals is currently in place.

Work Zone Rules of the Road:

• Stop on Red: Treat temporary signal lights with the exact same authority as a permanent intersection light. Do not proceed until the light turns green.
• Do Not Pass: Never cross over double yellow lines or attempt to pass queued traffic in a one-way control zone.
• Slow Down & Watch for Workers: Speed limits are reduced through active construction zones. Under California law, traffic fines are doubled in work zones.
• Plan Extra Time: If you are commuting along the Russian River corridor between Guerneville, Vacation Beach, and Monte Rio, please build extra travel time into your daily schedule.

Work on these SR-116 corridor safety improvements is anticipated to be completed in early 2027. All work is subject to change based on weather and field conditions.