| Abbreviation | Definition |
|---|---|
| SSS | Short Straight Section |
| SSS | Super Sports Sedan |
| SST | Short Section Track |
| SST | Slip Stream Transport |
| SST | Sophisticated Sports Touring |
| SSTA | Special Services Transportation Agency |
| SSTG | Supplementary Special Transportation Grant |
| SSTI | State Smart Transportation Initiative |
| SSV | Sidewalk Snow Vehicle |
| SSV | Southeastern Specialty Vehicles |
| SSVS | Super Smart Vehicle System |
| SSZ | Super Sprint Zagato |
| ST | Semi Tread |
| ST | Ship To .... |
| ST | Short Tread |
| ST | Sign Type |
| ST | Special Touring |
| ST | Special Trailer |
| ST | Special Transport |
| ST | Sport Turismo |