457 

Pipeline and Haz. Matls. Safety Admin., DOT 

Pt. 173 

where the material is relinquished to an-
other entity. Railroad facilities are railroad 
property including, but not limited to, clas-
sification and switching yards, storage fa-
cilities, and non-private sidings; however, 
they do not include an offeror’s facility, pri-
vate track, private siding, or consignee’s fa-
cility. Each rail carrier must use best efforts 
to communicate with its shippers, con-
signees, and interlining partners to ensure 
the safety and security of shipments during 
all stages of transportation. 

C. Because of the varying operating envi-

ronments and interconnected nature of the 
rail system, each carrier must select and 
document the analysis method/model used 
and identify the routes to be analyzed. 

D. The safety and security risk analysis 

must consider current data and information 
as well as changes that may reasonably be 
anticipated to occur during the analysis 
year. Factors to be considered in the per-
formance of this safety and security risk 
analysis include: 

1. Volume of hazardous material trans-

ported; 

2. Rail traffic density; 
3. Trip length for route; 
4. Presence and characteristics of railroad 

facilities; 

5. Track type, class, and maintenance 

schedule; 

6. Track grade and curvature; 
7. Presence or absence of signals and train 

control systems along the route (‘‘dark’’ 
versus signaled territory); 

8. Presence or absence of wayside hazard 

detectors; 

9. Number and types of grade crossings; 
10. Single versus double track territory; 
11. Frequency and location of track turn-

outs; 

12. Proximity to iconic targets; 
13. Environmentally sensitive or signifi-

cant areas; 

14. Population density along the route; 
15. Venues along the route (stations, 

events, places of congregation); 

16. Emergency response capability along 

the route; 

17. Areas of high consequence along the 

route, including high consequence targets as 
defined in § 172.820(c); 

18. Presence of passenger traffic along 

route (shared track); 

19. Speed of train operations; 
20. Proximity to en-route storage or repair 

facilities; 

21. Known threats, including any non-pub-

lic threat scenarios provided by the Depart-
ment of Homeland Security or the Depart-
ment of Transportation for carrier use in the 
development of the route assessment; 

22. Measures in place to address apparent 

safety and security risks; 

23. Availability of practicable alternative 

routes; 

24. Past incidents; 
25. Overall times in transit; 
26. Training and skill level of crews; and 
27. Impact on rail network traffic and con-

gestion. 

[73 FR 20772, Apr. 16, 2008] 

PART 173—SHIPPERS—GENERAL RE-

QUIREMENTS FOR SHIPMENTS 
AND PACKAGINGS 

Subpart A—General 

Sec. 
173.1

Purpose and scope. 

173.2

Hazardous materials classes and index 

to hazard class definitions. 

173.2a

Classification of a material having 

more than one hazard. 

173.3

Packaging and exceptions. 

173.4

Small quantity exceptions. 

173.4a

Excepted quantities. 

173.5

Agricultural operations. 

173.5a

Oilfield service vehicles, mechanical 

displacement meter provers, and road-
way striping vehicles exceptions. 

173.5b

Portable and mobile refrigeration 

systems. 

173.6

Materials of trade exceptions. 

173.7

Government operations and materials. 

173.8

Exceptions for non-specification pack-

agings used in intrastate transportation. 

173.9

Transport vehicles or freight con-

tainers containing lading which has been 
fumigated. 

173.10

Tank car shipments. 

173.11

Exceptions for shipment of light 

bulbs containing hazardous materials. 

173.12

Exceptions for shipment of waste ma-

terials. 

173.13

Exceptions for Class 3, Divisions 4.1, 

4.2, 4.3, 5.1, 6.1, and Classes 8 and 9 mate-
rials. 

Subpart B—Preparation of Hazardous 

Materials for Transportation 

173.21

Forbidden materials and packages. 

173.22

Shipper’s responsibility. 

173.22a

Use of packagings authorized under 

special permits. 

173.23

Previously authorized packaging. 

173.24

General requirements for packagings 

and packages. 

173.24a

Additional general requirements for 

non-bulk packagings and packages. 

173.24b

Additional general requirements for 

bulk packagings. 

173.25

Authorized packagings and over-

packs. 

173.26

Quantity limitations. 

173.27

General requirements for transpor-

tation by aircraft. 

173.28

Reuse, reconditioning and remanufac-

ture of packagings. 

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