8.1 Sector Descriptions and Overview
The locomotive sector includes railroad locomotives powered by diesel-electric engines. A diesel-electric locomotive uses 2-stroke or 4-stroke diesel engines and an alternator or a generator to produce the electricity required to power its traction motors. The locomotive source category is further divided up into categories: Class I line haul, Class II/III line haul, Passenger, Commuter, and Yard. Table 8.1 below indicates locomotive SCCs and whether they are included in EPA estimated emissions. If not in EPA estimates, then all emissions from that SCC that appear in the inventory are from S/L/T agencies.
| SCC | Description | EPA Estimated? | Data Category |
|---|---|---|---|
| 2285002006 | Mobile Sources Railroad Equipment Diesel Line Haul Locomotives: Class I Operations | Yes – at county-level | Nonpoint |
| 2285002007 | Mobile Sources Railroad Equipment Diesel Line Haul Locomotives: Class II / III Operations | Yes – at county-level | Nonpoint |
| 2285002008 | Mobile Sources Railroad Equipment Diesel Line Haul Locomotives: Passenger Trains (Amtrak) | Yes – at county-level | Nonpoint |
| 2285002009 | Mobile Sources Railroad Equipment Diesel Line Haul Locomotives: Commuter Lines | Yes – at county-level | Nonpoint |
| 2285002010 | Railroad Equipment Diesel Yard Locomotives | No | Nonpoint |
| 28500201 | Internal Combustion Engines Railroad Equipment Diesel Yard | Yes – as point sources | Point |