Transportation Codes (Operational Focus)

As an AOM, you might also be tested on the mechanical transportation codes used in the coach numbering system:

  • W-G-AC-CW: Self-Generating (W) Bogie (G) Air-Conditioned (AC) 2-Tier (CW).

  • WGACCN: Self-Generating (W) Bogie (G) Air-Conditioned (AC) 3-Tier (CN).

  • LWAC CN: LHB (L) Bogie (W) Air-Conditioned (AC) 3-Tier (CN).

  • LWSCN: LHB (L) Bogie (W) Second Class (S) 3-Tier Sleeper (CN).

  • WLRRM: Self-Generating (W) Luggage (L) Brake (R) Generator (M) Car (Power Car).

The LHB, vestibuled, Non-AC, 3-tier sleeper coach is coded as LWSCN.

In the Indian Railways coding system:

  • L denotes LHB (Linke Hofmann Busch) design.

  • W denotes Vestibuled.

  • SCN denotes 3-tier Sleeper Coach.

Important Coach Type Codes

For the AOM exam, it is essential to understand how these codes are structured based on the coach's class and characteristics.

Code

Type of Coach

ACCW

AC 2-Tier Sleeper (Self-Generating)

ACCN

AC 3-Tier Sleeper (Self-Generating)

LWACCW

LHB AC 2-Tier Sleeper

LWACCN

LHB AC 3-Tier Sleeper

WSCN

3-Tier Sleeper (Non-AC, ICF Design)

LWSCN

LHB 3-Tier Sleeper (Non-AC)

GS

General Second Class (Unreserved)

LWSCZ

LHB Second Class Chair Car (Non-AC)

LWCTAC

LHB 3-Tier AC Tourist Coach

WCB

Pantry Car (Catering Van)

SLR

Seating-cum-Luggage and Brake Van

LSLRD

LHB Second Class Luggage-cum-Brake Van with Divyangjan compartment


🎯 High-Yield Exam Point: Numbering Ranges

The last three digits of a 5-digit coach number (e.g., 04105) tell you the type:

  • 001–025: First AC

  • 026–050: Composite (1AC + 2AC)

  • 051–100: AC 2-Tier

  • 101–150: AC 3-Tier

  • 151–200: AC Chair Car

  • 201–400: Sleeper Class

401–600: General Class (Unreserved)