APM: 20 Location: SR 20 and E St, Williams Reassurance shield after the 20 Business split. APM: 21 Location: SR 20 and Old Hwy 99W, Williams Shortly thereafter we’ll approach a grade-separated intersection with I-5 Business. Turn left here to connect to 5 Business.  E to I-5, W to SR 16  N to I-5, S to SR … Continue reading California State Route 20, SR 20 Bus to I-5 Bus