Acronyms or Definitions:


Acronyms and Word Definitions for Rail (in alphabetical order)

40 Year: Inspection required after 40 years from build or service for safety. Short for Amtrak PC2 inspection.

800###: A private pass car when it meets AMTRAK standards is assigned an 800,000 number for ID.

AAR: Association of American Railroads

AAPRCO: American Association of Private Rail Car Owners

ABA: Air Brake Association

ABT: Air Brake Test

AC: Alternating Current

AEI Tag: Automatic Equipment Identification Tag is an RFID (Radio Frequency Identification Device) that allows tracking of your car.

Age: How old the car or loco is from first build date.

AMTK: Amtrak, the National Railroad Passenger Corporation is actually the 8th class one railroad

Amtrak PC: Amtrak Private Car Forms that define the car.

ASLRRA: American Short Line and Regional Railroad Association

Arrows: Amtrak system for tracking their equipment and private rail equipment. With PTC coming Arrows and Umler need to match!

BART: Bay Area Rapid Transit (San Francisco, CA)

Blue Flag: flag or light during day and light at night that indicates workers are in/under/around car, do not move car or couple to car. May only be removed by person who placed it.

BNSF: Burlington Northern Santa Fe (1 of 7 class one railroads)

Brake Rate: How quickly the car or loco slows in mph/second.

Brake Ratio: Force applied to slow the wheels divided by the car weight and is used to calculate brake rate. It is required in Umler for freight cars now and is coming for passenger cars.

Build Date: Build date in car or locos first incarnation for equipment is shown in Month/Date/Year.

CARB: California Air Resources Board (emissions)

CAT's: Certified Air Technicians

CEPM: Component Equipment Performance Tracking now known as Component Tracking. ID of major critical components on cars and locos such as wheels, bearings, axles, brake hardware, etc.

CG: Center of Gravity.

CHARM: Car Hire Accounting Rate Master (railroads use)

CN: Canadian National (1 of 7 class one railroads)

Component Registry: Registration of wheels, axles, brake parts etc in Umler. Currently freight only, but passenger is coming.

CP: Canadian Pacific (1 of 7 class one railroads)

CSM: Centralized Station Master

CSX: CSX Corporation (1 of 7 class one railroads)

COMM: 27 pin Communications line

COT&S: Cleaned, Oiled Tested and Stenciled; periodical process for servicing passenger car brake valve systems.

Crash Energy Management: a design configuration of new passenger cars and locos that utilizes push back couplers and end of car deformation to keep the cars in alignment and absorb some of the crash energy

CRB: Car Repair Billing; how shops invoice repairs and parts

CUPS: Cab Unit Preservation Society (RPCA)

DART: Dallas Area Rapid Transit

DC: Direct Current

DDCT: Damaged and Defective Car Tracking.

DIT: Dead In Tow, or locos moving dead

DOT: US Department of Transportation

DSTM: Designation for a steam engine in Umler

EHMS: Equipment Health Management System; a Railinc service similar to Umler

EPA: U.S. Environmental Protection Agency

Error: In Umler, this is an incorrect entry that will not allow the computer to complete the upload or change process

ETC: Equipment Type Code, not etc. ‘et cetera’

FAQ: Frequently Asked Questions

FRA: Federal Railroad Administration (part of US DOT)

FRED: Functional Rear End Device or EOT Device: used in place of caboose.

FUR: Find Us Rail the Railinc electronic rail industry phone book.

Gen: a) generation (order of build)
b) generator set

GRL: Gross Rail Load; the sum of the Tare and Load weights

Hog Law: Hours of Service limit for train crews

HEP: Head End Power

ICC: Interstate Commerce Commission (replaced by STB)

ID: Identification

IDT: In Date Test (includes Amtrak Annual Test); not a COT&S

KCS: Kansas City Southern (1 of 7 class one railroads)

LIRR: Long Island Rail Road; commuter railroad in New York City area

LL: Load Limit; the sum of all commodities (including people) carried on/in a car

LMOA: Locomotive Maintenance Officers Association

LOA: Railinc’s Letter of Authorization, allowing a third party to do your work within your reporting mark

MARC: Commuter railroad part of Maryland Mass Transit Administration

MCB: Master Car Builders (early 20th century association of car builders)

Metra: Commuter railroad in Chicago Illinois area

Metro North: Commuter railroad in New York City area

MOW: Maintenance of Way

MU: Multiple Unit
a. Multiple diesel locos under control of one engineer
b. Multiple car bodies mechanically connected together

NFL: No Field Lube; a type of modern roller bearings

NJT: New Jersey Transit

NMFTA: National Motor Freight Traffic Association (shares reporting marks with rail industry)

NRHS: National Railway Historical Society

NRPC: National Railroad Passenger Corporation aka Amtrak

NS: a) Norfolk Southern (1 of 7 class one railroads)
b) Nashville Star: commuter operation in Nashville Tennessee area

NYAB: New York Air Brake Company, now a division of Knorr Bremse

OL: Operation Lifesaver

Payload: the sum of all commodities (including people) carried on/in a car, also Load

Plate Code: Old engineering term for "drawing", in railroading is
a) the Clearance Diagram that describes the largest car or loco that may pass
b) describes the height and width dimensions of cars or locos with respect to how much clearance that rolling stock requires

PTC: Positive Train Control (new train control system mandated by Congress where hazardous materials and/or passengers are carried)

PC1: renewal process and inspection form to retain 800,000 number (annual)

PC2: inspection process and form to apply for 800,000 number (initial and time/mileage based)

PSGR: Short for Passenger

Reporting Mark: Assigned “owner” identifier shared with trucking, containers, semi trailers, etc. For rail this 4 alpha code is assigned by Railinc.

RFI: Restricted From Interchange, alternately Restricted In Interchange; a term applied by the Umler computer to designate a car or loco that should not be interchanged or even moved by a railroad

RSA: Railway Supply Association

RPCA: Railroad Passenger Car Alliance

Rule G: No Booze, drugs, on the job or prior to the job that can affect performance.

S-4045: Current minimum standard for passenger cars moving over freight railroads and in "excursion" service.

SCAQMD: South Coast Air Quality Management District (California emissions)

SCTD: Single Car Test Device; A device used to test car air brake systems.

SEPTA: Southeastern Pennsylvania Transportation Authority

Shop Code: 3 Character Alpha Code assigned by Railinc to railcar and locomotive repair facilities so they may upload Inspections, Air Brake Tests, etc.

SMP: Standard Maintenance Practices. Amtrak standards for maintenance/repairs.

SPLC: Standard Point Location Code (shared with Trucking, Containers etc)

STCC: Standard Transportation Commodity Codes

SOP: Standard Operating Procedures

SRP or S&RP: AAR Standards & Recommended Practices. How manufacturing and repair is supposed to be completed.

STB: US Surface Transportation Board (replaced the ICC)

Tare: the empty weight of a car or loco

TC: Transport Canada (equivalent of FRA/STB)

Tier: a) level of EPA mandated engine emissions expressed by numbers
b) level of crash energy management for cars and locos also expressed by numbers

TRI-RAIL: Tri County Commuter Rail Authority of Pompano Beach, FL

TTC: Transportation Technology Center (owned by DOT/operated by AAR)

UMLER:  An acronym for Universal Machine Language Equipment Register.  With the re-write of the system, which went live in August of 2009, the acronym was retired, but the system is still known as Umler.

UP: Union Pacific (1 of 7 class one railroads)

VRE: Virginia Railway Express (commuter agency)

WABCO: Westinghouse Air Brake Company, now WABTEC

WCO: Western Car Owners