APM: 3 Location: US 101 and SR 116, Petaluma Reassurance shield after the 116 split. APM: 3 Location: US 101 and Petaluma Blvd, Sonoma Cty As we head out of Petaluma, we’re a half mile from 101 Business rejoining. APM: 2 Location: US 101 and Petaluma Blvd, Sonoma Cty Exit for US 101 Business north.  S to US-101 … Continue reading U.S. Route 101, SR 116 to US-101 Bus