APM: 8 Location: Main St and US 101, Santa Maria No reassurance shield as 166 splits from US 101. APM: 7 Location: Main St and Broadway, Santa Maria  A few blocks later we’ll approach US 101 Business/SR 135. Turn left for the southbound highway and right for the northbound highway. Stay straight to stay on 166 west. … Continue reading California State Route 166, US-101 to US-101 Bus/SR 135