AMP: 142 Location: Route 66 and I-40, Yavapai Cty As I-40 Business begins, we’re directed to stay straight for Route 66. Most of 40 business follows Route 66 AMP: 142 Location: Route 66 and I-40, Yavapai Cty As we near Seligman, stay straight on Route 66 to get to Supai Junction in 31 miles. 66 … Continue reading Interstate 40 Business, I-40 to I-40