APM: 2 Location: SR 12 and Chadbourne Rd, Fairfield Reassurance shield as SR 12 splits from I-80. APM: 4 Location: SR 12 and Pennsylvania Ave, Fairfield SR 12 is, like many California highways, named after a deceased low ranking law enforcement official. APM: 4 Location: SR 12 and Jackson St, Suisun City Just after that we’ll enter Suisun … Continue reading California State Route 12, I-80 to SR 113