  Built upon the risk analysis methodology (presented in the part I paper),
this part II paper focuses on applying this methodology. Five illustrative
scenarios were used to analyze the best or worst cases and compare the
transportation risk differences between service options using unit trains and
manifest trains. The comparison results indicate that if all tank cars are
placed at the positions with the lowest probability of derailing and if
switching tank cars alone in classification yards, it could provide the lowest
risk estimate given the same transportation demand (i.e., number of tank cars
to transport). This paper also shows that based on the data and parameters in
the case study, risks during arrival/departure events and yard switching events
could be as significant as risks that on mainlines. This paper provides a way
to use the risk analysis methodology for rail safety decisions. The methodology
and its application can be tailored to specific infrastructure and rolling
stock characteristics.
