APM: 0 Location: US 101 and Broadway, San Luis Obispo Cty As we enter Santa Maria, exit for SR 135 south, which also carries US 101 Business south. Keep left for 101 south/166 west.    W to US-101, E to SR 33  S to SR 166, N to US-101 Bus  S to SR 166  S to SR … Continue reading California State Route 166, US-101 to US-101 Bus/SR 135