CSX transports hazardous materials regularly such as gasoline, chemicals, and flammable materials. The interviewer wants to understand better the experience that you bring when it comes to moving highly sensitive shipments. Discuss the breadth of your expertise by giving details such as what you have transferred and how often, being sure to highlight your success and safety record.
If you do not have experience working with shipments that are restricted or hazardous, be sure to express the fact that you are safety conscious and comfortable working in a potentially dangerous work environment.