APM: 9 Location: Merritt St and Poole St, Castroville Just after SR 156, we’ll enter downtown Castroville. APM: 9 Location: Merritt St and Mead St, Castroville As we get to the north side of downtown, we’re advised that only right turns are allowed onto SR 1. APM: 9 Location: Merritt St and SR 1, Castroville Follow 1 north … Continue reading California State Route 183, SR 156 to SR 1