| Abbreviation | Definition |
|---|---|
| RICS | Road Inventory and Classification Services |
| RID | Rear Impact Dummy |
| Ride | Car, truck, or other means of transportation |
| RIDE | Reduce Impaired Driving Everywhere |
| RII | Remote Ignition Interupter |
| RIMS | Regional Information Management System |
| RIN | Registration Identification Number |
| RIO | Ride It Out |
| RIPTA | Rhode Island Public Transit Authority |
| RIRO | Right-In/Right-Out |
| RIRS | Railroad Inspection Reporting System |
| RISE | Route Improvement Synthesis And Evaluation |
| RITA | Regional Infrastructure Transportation Agency |
| RITC | Regional Intermodal Transportation Center |
| RIV | Rapid Intervention Vehicle |
| RIV | Registrar of Imported Vehicles |
| RIV | Riviera |
| RIVIT | Railway Infrastructure and Vehicle Inspection Technology |
| RIVS | Registro Italiano Veicoli Storici (Italian Historical Vehicles Register) |
| RIVS | Road Infrastructure for Vehicle Safety |