Caltrans has been planning for these events knowing that power outages would affect traffic signals on rural highways and on- and off-ramp signals in some of the more populated areas. Based on estimated outage area maps, CalTrans is roughly able to determine which signals will be impacted and ordered needed stop signs with barricades or generators for deployment. The Caltrans Maintenance and Electrical teams have been essential in staging signs or generators before PG&E cuts power so that everything is deployed and can be easily implemented when power is cut. The generators are also manned 24/7 by Caltrans staff so they can be refueled without any impacts to signal operation.
In addition, when PG&E announces planned PSPS events, CalTrans staffs additional employees to work shifts, etc. so they always have coverage to keep motorists safe on the roadway.