| Calibration/Inspection/Testing | Services related to equipment calibration, track, bridge, facility, and equipment inspections, material and various other testing. |
| Consulting/Training Services | Various specialized, professional consulting and training services. |
| Engineering Design/Construction/Maintenance | Professional engineering design, heavy operated equipment services (on-track and off-track), track, signal, and structures construction services. |
| Equipment | Specialized track equipment, material handling and shop equipment, parts, and maintenance services. |
| Fuel/Lubricants/Fuel Services | Diesel, gasoline, and oil purchases and inspections/testing. Fuel storage, transportation, and facility maintenance services. |
| Health/Environmental/Safety | Health and medical services, demolition and removal services, recycling, testing, and professional consulting. |
| Intermodal/Auto Ramps | Container, chassis, and equipment purchases, ramp services, equipment maintenance and repair. |
| IT/Telecommunications | Hardware, software, programming resources, tower purchases and services, locomotive technology components. |
| Locomotive | Locomotive purchases, parts, and maintenance services. |
| Maintenance, Repair, Operating (MRO) | Materials and services to maintain and operate facilities, buildings, and equipment. |
| Railcar | Railcar purchases, parts, and maintenance services. |
| Railroad Infrastructure | Ballast (rock), bridge and signal materials, rail, ties, and track components. |
| Transportation/Vehicle Fleet | Material transportation (logistics), train crew transportation, vehicle fleet operations/administration. |
| Vegetation Management | Material and service associated with vegetation treatment and mechanical cutting. |
