456 

49 CFR Ch. I (10–1–18 Edition) 

Pt. 172, App. C 

A

PPENDIX

C 

TO

P

ART

172—D

IMENSIONAL

S

PECIFICATIONS FOR

R

ECOMMENDED

 

P

LACARD

H

OLDER

 

A

PPENDIX

D 

TO

P

ART

172—R

AIL

R

ISK

 

A

NALYSIS

F

ACTORS

 

A. This appendix sets forth the minimum 

criteria that must be considered by rail car-
riers when performing the safety and secu-
rity risk analyses required by § 172.820. The 
risk analysis to be performed may be quan-
titative, qualitative, or a combination of 
both. In addition to clearly identifying the 
hazardous material(s) and route(s) being ana-
lyzed, the analysis must provide a thorough 

description of the threats, identified 
vulnerabilities, and mitigation measures im-
plemented to address identified 
vulnerabilities. 

B. In evaluating the safety and security of 

hazardous materials transport, selection of 
the route for transportation is critical. For 
the purpose of rail transportation route 
analysis, as specified in § 172.820(c) and (d), a 
route may include the point where the car-
rier takes possession of the material and all 
track and railroad facilities up to the point 

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