S SA - Savannah and Atlanta Railway; Central of Georgia Railroad SAL - Seaboard Air Line Railway; Seaboard System Railroad; CSX Transportation SAMX - Cargill, Inc. (Seaboard Allied Milling Department) SAN - Sandersville Railroad SANX - San Angelo Tank Car Line SAPT - Savannah Port Terminal Railroad SATX - City Public Service Board of San Antonio SAUX - Sauvage Gas Company SAWX - Sawco, Inc. SAZX - Saz Transportation Corporation SB - South Buffalo Railway SBC - Ferrocarril Sonora Baja California SBD - Seaboard System Railroad; CSX Transportation SBGX - Industry Financial Corporation SBIX - Standard Brands, Inc. SBK - South Brooklyn Railway SBLN - Sterling Belt Line Railway SBLX - Sunbelt/Chlor/Alkali Partnership SBM - St. Louis, Brownsville and Mexico SBVR - South Branch Valley Railroad SC - Sumter and Choctaw Railway SCAX - Southern California Regional Rail Authority (Metrolink) SCBG - Santa Cruz, Big Trees and Pacific Railway
SCCX - Shell Oil Company SCEX - Southern California Edison SCFE - South Central Florida Railroad SCFS - Straits Car Ferry Service Corporation SCGX - Schuler Grain Company; Eades Commodities SCHX - Stauffer Chemical Company SCJX - Gulf Oil Products Company; Chevron Phillips Chemical Company SCL - Seaboard Coast Line Railroad; Seaboard System Railroad; CSX Transportation SCLX - Spielman & Caddell Leasing SCM - Strouds Creek and Muddlety Railroad SCMX - Shell Oil Company SCOX - Scoular Bishop Grain Company SCPX - Shell Oil Company SCR - SCR SCRW - Seaway Commercial Railway SCST - Seaboard Transportation Company (subsidiary of Seaboard Coast Line Railroad) SCT - Sioux City Terminal Railway SCTR - South Central Tennessee Railroad SCWX - South Carolina Public Service Authority SCXF - South Central Florida Express, Inc. SCXY - St. Croix Valley Railroad SCYX - Farmers Cooperative Association of York, Nebraska SDA - San Diego and Arizona Railway SDAE - San Diego and Arizona Eastern Railway SDCX - AMAX Chemical Corporation SDER - San Diego Electric Railway SDEX - Swindell-Dressler Energy Supply Company SDIV - San Diego and Imperial Valley Railroad (expired) SDIY - San Diego and Imperial Valley Railroad SDNX - North County Transit District SDPX - South Dakota Soybeen Processors SDRX - Sounder commuter rail SE - Ferrocarriles Unidos del Sureste SECX - South-East Coal Company SEIX - Seimax Gas Corporation SEMX - Seminole Electric Cooperative SEPA - SEPTA SEPX - Southwestern Electric Power Company SERA - Sierra Railroad SERX - ACF Industries (Shippers Car Line Division) SFIX - System Fuels, Inc. SFLC - Atchison, Topeka and Santa Fe Railway; BNSF Railway SFLR - Shore Fast Line Railroad SFPP - Spruce Fall Power and Paper SFQ - Atchison, Topeka and Santa Fe Railway; BNSF Railway End Of Train Devices SFRB - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch) SFRC - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch) SFRD - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch) SFRE - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch) SFRP - Atchison, Topeka and Santa Fe Railway (Santa Fe Refrigerated Despatch) SFSR - Santa Fe Southern Railway SFSX - San Francisco Transportation Services Company SFTX - Continental Tank Car Corporation SGAX - SGA Leasing Company SGCX - Sungas Corporation of Florida SGIX - LPG Transportation, Inc. SGLR - Seminole Gulf Railway SH - Steelton and Highspire Railroad SHLX - Procor Ltd. SHPX - American Industrial Transport, formerly ACF Leasing/Shippers Car Line Division SHQX - American Industrial Transport SHRX - Kansas City Railroad Museum SI - Spokane International Railroad; Union Pacific Railroad SIGX - Southern Indiana Gas and Electric Company SIMX - Sierra Bag Company SIND - Southern Indiana Railway SIRC - Staten Island Railway SIRR - Southern Industrial Railroad SIRX - Southern Illinois Railcar Corporation SJFX - Western Fuels & Asphalt Supply, Inc.; GLNX Corporation SJMX - St. Joe Minerals Corporation SJRT - St. Johns River Terminal SJT - St. Joseph Terminal Railroad SJVR - San Joaquin Valley Railroad SKCX - ARCO Chemical Company SKNX - Saskatchewan Grain Car Corporation SKOL - South Kansas and Oklahoma Railroad SKPX - Saskatchewan Grain Car Corporation SKSX - Safety-Kleen Systems, Inc. SKTX - Ski Train SL - Salt Lake City Southern Railroad SLAW - St. Lawrence Railroad SLAX - St. Lawrence Starch Company, Ltd. SLC - San Luis Central Railroad SLGG - Sidney and Lowe Railroad SLGW - Salt Lake, Garfield and Western Railway SLH - Sugarloaf and Hazelton Railroad SLOX - Selox, Inc. SLR - St. Lawrence and Atlantic Railroad SLRG - San Luis and Rio Grande Railroad SLRX - Southern Locomotive & Railcar SLSF - St. Louis - San Francisco Railway (Frisco); Burlington Northern Railroad SLWC - Stillwater Central Railroad SLTX - Slade Transport, Inc. SM - St. Mary's Railroad SMA - San Manuel Arizona Railroad SMAR - Sonoma–Marin Area Rail Transit SMCX - San Miguel Electric Cooperative SMEX - South Mississippi Electric Power Association SMMX - St. Mary's Cement Company SMPX - Stone Mountain Scenic Railroad SMRR - Sisseton Milbank Railroad SMNX - Solvay Minerals, Inc. SMRX - Southeastern Railway Museum SMV - Santa Maria Valley Railroad SN - Sacramento Northern Railway SNBL - Sioux City and New Orleans Barge Line SNCT - Seattle and North Coast Railroad SNFX - IND/AG Chemicals, Inc. SNHX - IND/AG Chemicals, Inc. SNJX - NJ Transit River Line work train (Southern New Jersey Rail Group) SOEX - Shell Oil Company SOGX - Diamond Shamrock Chemicals Company SOIX - Sand Seed Service, Inc. SOLX - Solano Rail Car Company SOM - Somerset Railroad SOO - Soo Line Railroad; Canadian Pacific Railway SOPR - South Pierce Railroad SOR - Southern Ontario Railway SOU - Southern Railway; Norfolk Southern Railway SP - Southern Pacific Railroad; Union Pacific Railroad SPAX - SEPTA SPCX - SPC Rail Group LLC SPEG - Spencerville and Elgin Railroad SPFE - Pacific Fruit Express; Southern Pacific Railroad; Union Pacific Railroad SPGX - Suburban Propane SPMW - Southern Pacific Railroad; Union Pacific Railroad (maintenance of Way) SPQ - Southern Pacific Railroad; Union Pacific Railroad End Of Train Devices SPS - Spokane, Portland and Seattle Railway; Burlington Northern Railroad SPSX - Progress Rail Services SPUD - St. Paul Union Depot Company SQVR - Sequatchie Valley Railroad SRAX - Southern Rail Associates, Inc. SRC - Strasburg Railroad SRCX - Sid Richardson Carbon Company SRIX - Southern Region Industrial Realty, Inc.; Southwest Rail Industries, Inc. SRL - Swift Refrigerator Lines (expired) SRLX - General American Transportation Corporation SRN - Sabine River and Northern Railroad SROX - United States Department of Energy (Savannah River Operations Office) SRPX - Salt River Project Agricultural Improvement and Power District SRRX - Star Railroad Equipment SRY - Southern Railway of British Columbia SS - Sand Springs Railway SSAM - Sault Ste. Marie Bridge Company (subsidiary of Wisconsin Central) SSDK - Savannah State Docks Railroad SSGX - McMaster Grain Company SSH - South Shore Railroad SSR - S&S Shortline SSEX - Radius Recycling (Schnitzer Steel Industries) SSIX - Itel Corporation SSW - St. Louis Southwestern Railway (Cotton Belt); Southern Pacific Railroad; Union Pacific Railroad ST - Springfield Terminal Railway; Boston and Maine Railroad; Pan Am Railways STAX - Stauffer Chemical Company; OCI Chemical Corporation STC - Simpson Timber Company STCX - Sterling China Company STE - Stockton Terminal and Eastern Railroad STER - St. Thomas and Eastern Railway STEX - Sterling Chemicals, Inc. STLE - St. Louis & Evansville Railroad Co. STLX - A. E. Staley STMA - St. Maries River Railroad STMX - A. E. Staley STOX - ACF Industries STRC - Stuart Chemical Transportation STRT - Stewartstown Railroad STRX - St. Regis Paper Company STSX - A. E. Staley STTX - Trailer Train Company STWX - Struthers Wells Corporation SULX - Sultran SUN - Sunset Railway SUNX - Sun Refining and Marketing Company SUR - State University Railroad SVGX - Savage services SVI - Southern Railway of Vancouver Island, E and N Railway SVIL - Saltville Railroad SW - Southwestern Railroad SWCX - Estech, Inc. SWFX - Southwest Forest Industries, Inc. SWGX - Southwest Georgia Railroad Excursion Authority/SAM Shortline Excursion Train SWIX - Stonewall Industries LLC SWLX - Essel Corporation SWRX - Richmond Rail Equipment Leasing Company SWYX - Stauffer Chemical Company of Wyoming
References