APM: 21 Location: SR 20 and Old Hwy 99W, Williams Reassurance shield at the I-5 Business junction. APM: 21 Location: SR 20 and I-5, Williams Immediately after that we’ll approach mainline I-5. APM: 21 Location: SR 20 and I-5, Williams Turn right for I-5 south. Stay straight and turn left for I-5 north. APM: 22 Location: SR 20 and … Continue reading California State Route 20, I-5 Bus to I-5