AAR Car Service Directives
ACACSO
Lisa Gering
May 9, 2013
4/13/2015
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Agenda
• What is an AAR Car Service Directive (CSD)?
• Relationship between CSDs / UMLER Pools /
Transportation Code / Transportation Condition Codes
• Car Service Directives
• CSD 145
• CSD 150
• CSD 175
• CSD 435
• Resources
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Car Service Directives
• Car Service Directives govern the return of empty cars for
railroad marked or railroad controlled private cars.
• Car Management teams use Transportation Codes (TC)
and Transportation Condition Codes (TCC) to manage
empty car return for cars in assignment to UMLER Pools
and for Mechanical or age related circumstances.
• For all AAR Car Service Directives the car owner can issue
handling instructions different from the standard return
rules in the directive, but the holding road can exercise it’s
option to comply or return the car under provisions of the
directive.
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Pool Codes
Pool
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Description
No. of cars
C
16 C Pool – specific shipper at a specific location
46,996
G
Contaminated
200
J
Agent Pool (CSD 145 – Loading Exception)
3,679
N
National Pool – similar to ‘C’ except the equipment is
not assigned to a specific shipper or loading point
74,108
O
Recall pools – lease termination, shop
737
P
Commodity Pool
166,862
R
Agent Pool
52,324
U
Unassigned per CSD – 150
W
Unassigned Covered Hopper Cars
17,065
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CSD 145
• All car types (CSD 145) except covered hoppers (CSD 435).
• Cars in UMLER Pool Assignment assigned to shippers (C),
agent (R), or commodity (P) pools:
• Return empty to shipper or agent at loading point in
reverse of loaded movement.
• Cars in UMLER Pool Assignment assigned to national
pools (N):
• Handled per owners instructions (N national pools).
• Cars with TC of ‘G’ (contaminated) must be handled in
reverse of the loaded movement to the original loading
road.
• Exception: cars with TC of J may be reloaded.
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CSD 150
• Unassigned cars except covered hoppers
• Transportation code U
• Loaded to or via the home road; or
• Empty to car owner by reverse route; or
• To car owner by direct connection if not mechanical
designation FA, GTR, GTS, GWSR, HKR, HKS, HMA,
HMS, HMSR, HTR, HTS, HTSR, LF, LP, LM, LS, RC, RP
• Transportation code TU
• Loaded to or via the home road; or
• Empty to car owner by reverse route; or
• Deliver empty under the provisions of SCO90
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CSD 175
• Cars in UMLER Pool Assignment for Recall (O) lease
termination / Shopping / Reassignment pools:
• Transportation code O:
- Handled per owner’s instructions; or
- Delivered empty to home road at any junction; or
- Returned empty to the delivering road at the junction
received if that junction is not a junction with the
home road; or
- Loaded to the home road
• Transportation code TO:
- Same as above; plus
- Delivered empty under the provisions of SCO90
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CSD 435
•Cars in UMLER Pool Assignment; same as CSD 145
•Unassigned Covered Hopper cars, TC/TCC W.
• Return the car to the home road at any junction; or
• Return the car reverse route
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AAR Circular TD-5
Note: the chart above represents only a portion of the entire chart which can be
found in the Circular OT-10 on the RAILINC.COM website.
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Resources
•RAILINC.COM – Circular Number OT-10
•RAILINC.COM – UMLER Specification Manual
•ACACSO.ORG / Presentations
• Nov 2010 - ‘Transportation Codes & Transportation
Condition Codes – Todd Poland
• Nov 2011 – ‘Transportation Codes’ – Dale Cassels
• May 2012 – ‘Equipment Pools’ – Lynn Brown
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