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To Report Cal Trans Operated signals:
Daytime: (415) 330-6500
Evenings: (510) 286-6356
Cal Trans operates Highway 101 off-ramp signals:
Commerce Blvd North;
Wilfred Avenue,
Rohnert Park Expressway – Northbound and Southbound.
All other traffic signals:
Outages – (707) 588-3300
Emergency – (707) 584-2600