| Abbreviation | Definition |
|---|---|
| SHIT | Ship High In Transit |
| SHIT | Ship High In Transport |
| SHIT | Special Handling In Transit |
| SHIVA | Simulated Highways for Intelligent Vehicle Algorithms |
| SHLLV | Super Heavy-Lift Launch Vehicle |
| SHOC | Sydney Harbour Operations Centre |
| SHR | School House Road |
| SHRP | Safe Highway Research Pavement |
| SHRP | Strategic Highway Research Program |
| SHSA | State Highway Safety Agencies |
| SHT | Segway Human Transporter |
| SHTN | Saratoga Healthy Transportation Network |
| SHTP | Safe Housing and Transportation Program |
| SHTR | Sam Houston Toll Road |
| SHVS | Smart Hybrid Vehicle System |
| SHX | Shocks |
| SI | International System |
| SI | Sequential Injection |
| SI | Side Impact |
| SIAP | Standard Instrument Approach Procedure |