List of reporting marks: YYYAN - Yancey RailroadYARR - Youngstown and Austintown RailroadYB - Youngstown Belt RailroadYCR - Yakima Central RailwayYCRK - Yellow Creek RailroadYDHR - York Durham Heritage RailwayYRC - York RailwayYKR - Yorkrail; York RailwayYRPL - Yelm Roy Prairie LineYS - Youngstown and Southern RailwayYSDX - Youngstown Steel Door CompanyYSMX - Canadian Gypsum CompanyYSRR - Youngstown and Southeastern RailroadYSTX - Youngstown Sheet and Tube CompanyYSVR - Yellowstone Valley RailroadYV - Yosemite Valley RailwayYVT - Yakima Valley Transportation CompanyYW - Yreka Western Railroad