General Code of Operating Rules

The General Code of Operating Rules (GCOR) is a set of operating rules for railroads in the United States. The GCOR is used by Class I railroads west of Chicago, most of the Class II railroads, and many Short-line railroads.[1]

Some railroads in the northeast United States follow NORAC, while Canada and Mexico have their own set of operating rules that govern their railroad operations.[1]

Overview

The GCOR rules are intended to enhance railroad safety. The rules cover employee responsibilities, signaling equipment, procedures for safe train movement, dealing with accidents and other topics that directly and indirectly affect railroad safety. Some railroads modify the GCOR rules to suit their specific operations.

The GCOR is supplemented by System Special Instructions, Timetables, Hazardous Materials Instructions, Air Brake and Train Handling Instructions, and General Orders. These documents are issued by each individual railroad. System Special instructions, Timetables, and General Order can modify or amend the General Code of Operating Rules. GCOR 1.3.2 states that General Orders replace any rule, special instruction, or regulation that conflicts with the general order.[2]

Some railroads will maintain what they call a "living rulebook." As amendments are released via general order or special instruction, they will update the specific page that was affected.[1] An example of this is the Union Pacific, which maintains a copy of the GCOR with page-by-page amendments.[3]

The current version of the GCOR is the Ninth Edition, effective September 23, 2025.[4]

Categories

The full set of GCOR rules is divided into 19 categories.

  1. General Responsibilities
  2. Railroad Radio and Communication Rules
  3. Section Reserved
  4. Timetables
  5. Signals and Their Use
  6. Movement of Trains and Engines
  7. Switching
  8. Switches
  9. Block System Rules
  10. Rules Applicable Only in Centralized Traffic Control (CTC)
  11. Rules Applicable in ACS, ATC and ATS Territories
  12. Rules Applicable Only in Automatic Train Stop (ATS) Territory
  13. Rules Applicable Only in Automatic Cab Signal System (ACS) Territory
  14. Rules Applicable Only Within Track Warrant Control (TWC) Limits
  15. Track Bulletin Rules
  16. Rules Applicable Only in Direct Traffic Control (DTC) Limits
  17. Rules Applicable Only in Automatic Train Control (ATC) Territory
  18. Rules Applicable Only in Positive Train Control (PTC) Territory
  19. Section Reserved

See also

References

  1. ^ a b c "The General Code of Operating Rules (GCOR)". Garden Railways Magazine. Kalmbach Media (which owns "Trains.com"). Retrieved 2023-05-17.
  2. ^ General Code of Operating Rules. 2015.
  3. ^ UPRR - General Code of Operating Rules (PDF) (Seventh, amended ed.). Union Pacific. 20 Apr 2023. Archived (PDF) from the original on 17 May 2023.
  4. ^ "Views & News - August 20, 2025". ASLRRA. Retrieved 2025-10-16.

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