CCOR (Consolidated Code of Operating Rules), 1967, Railroads ⩔
- Butte, Anaconda, and Pacific Railroad (BAP/RARW)
- Chicago, Burlington, and Quincy Railroad (CBQ)
- Colorado Southern Railway (C&S/CS)
- Fort Worth and Denver Railway (FWD) — excluding the Joint Texas Division
- Chicago, Milwaukee, St. Paul, and Pacific Railroad—“The Milwaukee Road” (CMStP&P/MILW)
- Chicago and North Western Railway (C&NW/CNW) and Affiliated Lines
- Davenport, Rock Island, and North Western Railway—“The Rock” (CRI&P/CRIP/RI/ROCK)
- Des Moines Union Railroad (DMU)
- Duluth, Missabe, and Iron Range Railway (DM&IR/DMIR)
- Great Northern Railway (GN) and Affiliated Lines
- Minneapolis, Northfield, and Southern Railway (MN&S/MNS)
- Soo Line Railway (SOO/SLRR)
- Minnesota Transfer Railway (MTFR)
- St. Paul Union Depot Company
- Northern Pacific Railway (NP) and Affiliated Lines
- Portland Terminal Railroad (PTRC)
- Spokane International Railroad (SI)
- Spokane, Portland, and Seattle Railway (SP&S/SPS) and Affiliated Lines
- Union Pacific Railroad Company (UP) — Oregon Division
GCOR (General Code of Operating Rules), 1986, Railroads ⩔
- Atchison, Topeka, and Santa Fe Railway (AT&SF/ATSF)
- Burlington Northern Railroad (BN)
- Chicago and North Western Transportation (C&NW/CNW)
- Davenport, Rock Island, and North Western Railway (DRI&NW)
- Lake Superior and Ishpeming Railroad (LS&I/LSI)
- Minnesota Transfer Railway (MTFR)
- Missouri–Kansas–Texas Railroad System (MKT/MKTT/MKTZ)
- St. Louis Southwestern Railway—“The Cotton Belt” (SSW)
- Soo Line/Milwaukee System (SOO)
- Southern Pacific Transportation Company (SP)
- Union Pacific Railroad (UP) and Missouri Pacific Railroad—“The MoPac” (MP)
- Union Pacific System
NORAC (Northeast Operating Rules Advisory Committee), 12th Edition, Jan 2024, Railroads ⩔
NORAC 12th Edition Full Members:
- Amtrak (AMTK)
- Conrail Shared Assets Operations (CR)
- CSX Transportation (CSXT)
- Keolis Commuter Services/Massachusetts Bay Transportation Authority (MBTA) — Boston
- New Jersey Transit Rail Operations (NJTR)
- New York, Susquehanna and Western Railway (NYSW)
- Norfolk Southern (NS)
- Southeastern Pennsylvania Transportation Authority (SPAX/SEPA/SEPTA)
NORAC 12th Edition Associate Members:
- Adirondack Scenic Railroad (ADIX)
- Alstom Transportation/Maryland Area Regional Commuter (MARC)
- Alstom Transportation/New Jersey Transit (NJT) — River LINE
- Bay Colony Railroad (BCLR)
- Belfast and Moosehead Lake Railway (BML)
- Belvidere and Delaware River Railway (BDRV)
- Berkshire and Eastern Railroad (BERX/B&E)
- Berkshire Scenic Railway (BRMX)
- Cape Cod Central Railroad (CCC)
- Cape May Seashore Lines (CMSL)
- Connecticut Southern Railroad (CSO)
- Delaware, Lackawaxen, and Stourbridge Railroad (DL&S)
- Dover and Delaware River Railroad (DD)
- Dover and Rockaway River Railroad (DRRV)
- Downeast Scenic Railroad (DSRX)
- East Jersey Railroad and Terminal (EJR)
- East Penn Railroad (ESPN)
- Finger Lakes Railway (FGLK)
- Fore River Railroad (FRVT)
- Genesee Valley Transportation (GVT)
- Grafton and Upton Railroad (GU)
- Housatonic Railroad (HRRC)
- Keolis Virginia Railway Express (VREX/VRE)
- Maryland and Delaware Railroad (MDDE)
- Massachusetts Central Railroad (MCER)
- Massachusetts Coastal Railroad (MC)
- Metro-North Railroad (MNCW)
- Middletown and New Jersey Railroad (MNJ)
- Milford–Bennington Railroad (MBRX)
- Morristown and Erie Railway (ME)
- National Park Service
- Naugatuck Railroad (NAUG)
- New Hampshire Central Railroad (NHCR)
- New Hope Railroad (NHRR)
- New York New Jersey Rail (NYNJ)
- Newport and Narragansett Bay Railroad (NDT/N&NB)
- North Shore Railroad (NSHR)
- Pennsylvania Northeastern Railroad (PN)
- Plymouth and Lincoln Railroad (PLLX/P&L)
- Providence and Worcester Railroad (PW/PWRZ/P&W)
- Raritan Central Railway (RCRY)
- Seaview Transportation Company (SVTX)
- SMS Rail Lines (SLRS/SNY)
- Southern Railroad of New Jersey (SRNJ)
- TransitAmerica/CTrail Hartford Line (CNDX)
- Valley Railroad Company (VALE)
- West Chester Railroad (WCRL)
NORAC (Northeast Operating Rules Advisory Committee), 11th Edition, Feb 2018, Railroads ⩔
NORAC 11th Edition Full Members:
- Amtrak (AMTK)
- Conrail Shared Assets Operations (CR)
- CSX Transportation (CSXT)
- Keolis Commuter Services/Massachusetts Bay Transportation Authority (MBTA) — Boston
- New Jersey Transit Rail Operations (NJTR)
- New York, Susquehanna and Western Railway (NYSW)
- Norfolk Southern (NS)
- Southeastern Pennsylvania Transportation Authority (SEPTA)
NORAC 11th Edition Associate Members:
- Adirondack Scenic Railroad (ADIX)
- Bay Colony Railroad (BCLR)
- Belfast and Moosehead Lake Railway (BML)
- Bombardier Transportation/New Jersey Transit (NJT) — River LINE
- Cape Cod Central Railroad (CCC)
- Cape May Seashore Lines (CMSL)
- Columbia and Reading Railway (C&R)
- Delaware, Lackawaxen, and Stourbridge Railroad (DL&S)
- East Jersey Railroad and Terminal (EJR)
- East Penn Railroad (ESPN)
- Finger Lakes Railway (FGLK)
- Fore River Railroad (FRVT)
- Genesee Valley Transportation (GVT)
- Grafton and Upton Railroad (GU)
- Housatonic Railroad (HRRC)
- Iowa Pacific Holdings (IPH)
- Keolis Virginia Railway Express (VRE)
- Lehigh Railway (LRWY)
- Luzerne and Susquehanna Railway (LS)
- Massachusetts Central Railroad (MCER)
- Massachusetts Coastal Railroad (MC)
- Milford–Bennington Railroad (MBRX)
- Morristown and Erie Railway (ME)
- National Park Service
- Naugatuck Railroad (NAUG)
- New England Southern Railroad (NEGS)
- New Hampshire Central Railroad (NHCR)
- New Hope and Ivyland Railroad (NHRR)
- New York and Greenwood Lake Railway (NYGL)
- Newport and Narragansett Bay Railroad (N&NB)
- North Shore Railroad (NSHR)
- New York New Jersey Rail (NYNJ)
- Owego and Harford Railway (OHRY)
- Pan Am Railways (PAR)
- Pennsylvania Northeastern Railroad (PNE)
- Plymouth and Lincoln Railroad (P&L/PLLX)
- Raritan Central Railway (RCRY)
- Seaview Transportation Company (SVTX)
- Seminole Gulf Railway (SGLR)
- SMS Rail Lines (SLRS)
- Southern Railroad of New Jersey (SRNJ)
- Valley Railroad Company (VALE)
- West Chester Railroad (WCRL)
- Western New York and Pennsylvania Railroad (WNYP)
UCOR (Uniform Code of Operating Rules—US), 1950, Railroads ⩔
- Arkansas and Memphis Railway, Bridge, and Terminal Company (A&MRB&T)
- Burlington–Rock Island Railroad (BRI)
- Galveston, Houston, and Henderson Railroad (GH&H/GHH)
- Houston Belt and Terminal Railway (HBT)
- Midland Valley Railroad (MV)
- Missouri–Kansas–Texas Lines (MKT)
- Missouri Pacific Lines (MP)
- Oklahoma City–Ada–Atoka Railway (OCAA)
- Texas and Pacific Railway (T&P/TP)
- Kansas, Oklahoma, and Gulf Railway (KO&G/KOG)
- Missouri–Illinois Railroad (MI)
- Southern Illinois and Missouri Bridge Company
- Texas Pacific–Missouri Pacific Terminal Railroad of New Orleans (TRNO)
- Rock Island Lines (CRI&P/RI/CRIP)
- St. Louis Southwestern Railway (SSW)
- St. Joseph Belt Railway (SJB)
- Union Railway (of Memphis) (URY)
- St. Joseph Terminal Railway Company (SJT)
UCOR (Uniform Code of Operating Rules—US), 1968, Railroads ⩔
- Chicago and Eastern Illinois Railroad (CEI)
- Galveston, Houston, and Henderson Railroad (GH&H/GHH)
- Houston Belt and Terminal Railway (HBT)
- Missouri–Kansas–Texas Lines (MKT)
- Missouri Pacific Railroad (MP) and affiliated lines
- Texas and Pacific Railway (T&P/TP) and affiliated lines
- Kansas, Oklahoma, and Gulf Railway (KO&G/KOG) and affiliated lines
- Missouri–Illinois Railroad (MI) and affiliated lines
- Rock Island Lines (CRI&P/RI/CRIP)
- Rock Island Lines (RI) / Fort Worth and Denver Railway (FWD) — Joint Texas Division
- St. Louis Southwestern Railway (SSW)
- Union Terminal Company (DUTC) — Dallas
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