| Abbreviation | Definition |
|---|---|
| L&N | Louisville & Nashville Railroad |
| L&N | Louisville and Nashville Railroad |
| L&NE | Lehigh & New England Railroad |
| LA | Kansas City Southern Railway Company |
| LA | Louisiana and Arkansas Railway (Kansas City Southern Railway) |
| LACX | Goodyear Tire and Rubber |
| LACX | Goodyear Tire and Rubber Company |
| LAFX | Lafarge Corporation |
| LAHX | Calrail |
| LAHX | Transportation Equipment Incorporated |
| LAJ | Los Angeles Junction Railway |
| LAKX | City of Lakeland |
| LAL | Livonia Avon and Lakeville Railroad Corporation |
| LAL | Livonia, Avon and Lakeville Railroad |
| LAMX | Lamco |
| LANO | Lancaster Northern Railway (Penn Eastern Rail Lines) |
| LANO | Penn Eastern Rail Lines Incorporated |
| LANU | CATU Containers |
| LANU | CATU Containers S. A. |
| LAPT | Los Angeles Union Passenger Terminal |