APM: 0 Location: Lake Gregory Rd and SR 189, San Bernardino Cty Turn right to stay on 189 as soon as the route begins. APM: 0 Location: SR 189 and Lake Gregory Rd, San Bernardino Cty No reassurance shield after the turn. APM: 1 Location: SR 189 and North Rd, San Bernardino Cty Reassurance shield a mile later. … Continue reading California State Route 189, SR 18 to SR 173