| Abbreviation | Definition |
|---|---|
| LRMT | Light Rail and Modern Tramway |
| LRMX | Logistics Resource Management |
| LRPA | Little Rock Port Railroad |
| LRS | Laurinburg and Southern Railroad |
| LRS | Laurinburg and Southern Railroad Company |
| LRT | Light rail |
| LRTA | Light Rail Transit Association |
| LRTA | Light Rail Transit Authority |
| LRTS | Lego Rail Train System |
| LRTS | Light Rail Transit System |
| LRV | Light Rail Vehicles |
| LRWN | Little Rock and Western Railroad |
| LRWN | Little Rock and Western Railway LP |
| LRWY | Lackawanna Railway |
| LRWY | Lackawanna Railway Incorporated |
| LS | Luzerne and Susquehanna Railway Company |
| LS | Luzerne Susquehanna Railway |
| LSBC | La Salle and Bureau County Railroad (Chicago Rail Link) |
| LSBZ | Chicago Rail Link |
| LSBZ | La Salle and Bureau County Railroad (Chicago Rail Link) |