TOPS codes

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BRBritish Rail or British Railways introduced the American TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. (Total Operations Processing System) system for managing rolling stock in the late 1960s. Under TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock., every item of rolling stock was required to have a unique ID and and was allocated a classification code.

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. locomotive classification and numbering

BRBritish Rail or British Railways steam had finished before the introduction of TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock.. BRBritish Rail or British Railways Diesel locomotives were allocated numbers forming the unique ID in the form xxyyy, with xx being the class and yyy one of up to 999 members of it, for example 50031 Hood would have been the 31st Class 50 locomotive while in service.

Heritage diesel locomotives working on the main line are allocated numbers in the 89yyy series. Generally the third digit represents the power classification and the final two digits are the last two digits of the pre-TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. number, except where duplication occurs. TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. numbers allocated to SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society locomotives include:[1]

45110 cab interior showing the TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. number used in preservation
Heritage steam locomotives working on the main line are allocated numbers in the 98yyy series. Generally the third digit represents the power classification and the final two digits are the last two digits of the BRBritish Rail or British Railways era number, except where duplication occurs. TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. numbers allocated to SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society locos still resident on the SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society include:[2]

For heritage locomotives, the TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. number was used for reporting purposes and was commonly displayed inside the cab.

Heritage carriages used on the main line are allocated numbers in the 99yyy series. The SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society's GWR main line set were allocated the following TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. numbers:[3]

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. carriage and wagon classification codes

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classifications were applied to all carriages and wagons and recorded in a field called CARKND. For most rolling stock the classification comprises three letters, the first letter indicating the broad type, the second letter giving more detailed information of that type (different for each series) and a suffix giving the braking arrangements. The last was an important aid to marshalling trains at a time when BRBritish Rail or British Railways had a mixture of air, vacuum and other braking arrangements.[4]

Passenger carrying stock (type A) included a digit after the first two letters to specify the class of passenger accommodation (1=First, 2=Second, later Standard, 3=CompositeCarriage having more than one class of seating, ie First and Third or latterly First and Standard., 4=Unclassified, 5=None). The suffix indicated the build rather than the braking arrangement (1=Mk 1, Z=Mk 2, A=Mk 2a, etc.)[5]

Examples of the main classification codes (first letter) after 1984 were:

  • A: Hauled passenger carriages
  • B: Bogie Steel wagons
  • C: Covered bulk wagons (except CA: goods brake vans)
  • D: Diesel Multiple Unit carriages
  • F: Flat wagons
  • H: Hopper wagons
  • M: Mineral wagons
  • N: Hauled non-passenger carriages
  • O: Open wagons
  • Q: Hauled departmental (non-revenue) carriages
  • S: 2-axle steel wagons
  • T: Tank wagons
  • V: Vans
  • W: Flat wagons
  • Y: DepartmentalRolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic. bogie wagons
  • Z: DepartmentalRolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic. two-axle vehicle (carriage or wagon)

Examples of braking codes (third letter) were:

  • A: Air brake only
  • B: Air brake plus through vacuum pipe
  • O: Unfitted (handbrake only)
  • P: Unfitted with through vacuum pipe
  • Q: Unfitted with through air pipe
  • V: Vacuum brake only
  • W: Vacuum brake plus through air pipe
  • X: Dual brake (air and vacuum)

SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society rolling stock with TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification codes

Note: Most of the GWRGreat Western Railway / LNERLondon & North Eastern Railway / LMSLondon Midland & Scottish Railway era rolling stock had been withdrawn by the time TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. was introduced in the late 1960s and would therefore not have received TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification codes. Later SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society rolling stock with TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification codes includes:

Carriages

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification Description Examples
Mk 1 Passenger carrying stock (prefix A)
AA21 Corridor second

Operational: 25346, 25498, 25771
Staff accommodation: 24839, 24845, 25594, 25686

AA31 Corridor composite 16169, 16202, 16267
AB21 Brake corridor standard 34562, 34606, 34754, 35219
AB31 Brake corridor composite 21254
AC21 Tourist standard open 4345, 4399, 4505,

4545, 4550, 4593, 4690

AD11 First open 3083, 3103, 3109
AE21 Brake standard open 9220
AJ41 Restaurant Buffet 1667, 1682
AN21 Restaurant Miniature Buffet 1853, 1855, 1856
Mk 1 Non-Passenger carrying stock (prefix N)
NAV Brake gangwayed 80776, 81013
NJV GUV (ETHElectric Train Heating wired) 94157, 94200 (as built)
NKA GUV (BRUTEBritish Railways Utility Trolley Equipment, a wire caged trolley with a low floor developed by BR to replace existing luggage trucks and mail bag trolleys.) 94157, 94200 (as rebuilt)
NKV GUV (BRUTEBritish Railways Utility Trolley Equipment, a wire caged trolley with a low floor developed by BR to replace existing luggage trucks and mail bag trolleys.) 86105, 95154 (as built)
NNX Courier Van with dual Vacuum / Air braking 80222
NOx GUV 100mph 95154 (as rebuilt)

Wagons

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. code displayed on 'Seacow' DB980239
TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. classification Description Examples
Private-Owner Bogie Wagons (prefix J) (from 1990)
JGV Bogie Limestone Hopper (TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. code PHV before 1990) ICI 19052, ICI 19129
Mineral wagons (prefix M)
MCO 16t Open Mineral Wagon (unfitted) 118443, 257698
Vans (prefix V)
VAA 29t Vanfit (full length doors, ventilated), air braked 200176
VCV Cattle van, vacuum braked 891054
VDA 29t Vanfit, air braked 201056
Exceptional and Special Purpose Vehicles (prefix X)
XDV FLAT ED 906811, 906825, 906830
Bogie DepartmentalRolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic. Wagons (prefix Y)
YGA/YGB 'Seacow' Bogie Ballast Hopper 6 x Seacows
YLO 'Gane A' Bogie Rail Wagon 996730
YNO ‘Prawn’ Borail/Bolster Wagon 997623
YQA 'Parr' Bogie Rail Wagon 967526, 967577
2-axle DepartmentalRolling stock used for the railway’s own functions (engineering etc.) rather than for general passenger or goods traffic. Wagons (prefix Z)
ZBA ‘Rudd’ (also Carp/Hake) Ballast Open 15 x Rudds
ZCO ‘Tunny’ (and other) Ballast/Sleeper Open 991124
ZFV 'Dogfish' Ballast Hopper 983115
ZJV ‘Mermaid’ Side-Tipping Ballast Wagon 989098
ZMV ‘Mackerel’ Ballast Hopper 992329
ZUB ‘Shark’ Ballast Plough Brake Van (Vac fitted) 993876
ZUV ‘Shark’ Ballast Plough Brake Van (Air braked) 993898

TOPSTotal Operations Processing System, an American computer system adopted by BR from the late 1960s to number and manage rolling stock. location codes

See also

References

  1. RCTS TOPS Class 89 listing
  2. RCTS TOPS class 98 listing
  3. Railway Heritage Register Carriage Survey
  4. Wikipedia
  5. Longworth (2013) pp. 7-8.
  6. Location Codes on www.railwaycodes.org.uk

Links