APM: 0 Location: Auburn St and I-80, Colfax Just as SR 174 begins it makes a right to bypass downtown. APM: 0 Location: Auburn St and Central St, Colfax Turn right to follow 174 up to Grass Valley. APM: 0 Location: SR 174 and Main St, Colfax Reassurance shield a quarter mile or so after the turn. APM: 1 … Continue reading California State Route 174, I-80 to SR 20/SR 49