| Acronym | Sense | Language | Topics |
|---|---|---|---|
| TBC | Trams et Bus de la CUB (Communauté Urbaine de Bordeaux) | In French | |
| TCFN | Total Compagnie Française de Navigation | In French | → 665 → France |
| TCL | Transports en Commun Lyonnais | In French | → France |
| TCN | Transportation Control Number | In English | → Vehicle engineering |
| TCSP | Transport en Commun en Site Propre | In French | |
| TDA | Transportation Development Act | In English | |
| TDG | Traffic Design Group | In English | |
| TEA | Transport Policy Evaluation and Analysis | In English | → Politics |
| TEC | Transports En Commun en Wallonie | In French | |
| TEF | Tuluzaj Esperantistaj Fervojistoj | In Esperanto | → Organizations and associations → Artificial languages (linguistics) → France |
| TEN-T | Trans-European Networks-Transport | In English | |
| TER | Transports Express Régional | In French | |
| TGV | Train à Grande Vitesse | In French | → Rail transport engineering |
| TIPP | Taxe Intérieure sur les Produits Pétroliers | In French | → Taxes, duties → 665 |
| TL | Transports Lausannois | In French | |
| TL | Tramways Lausannois | In French | |
| TLO | Turun Linja-autoilijain Osakeyhtiö (www.tlo.fi) | In Finnish | → Finland |
| TMA | Trans Mediterranean Airways | In English | → Aeronautics, aircraft |
| TMA | Terminal Manoeuvre Area | In English | → Aeronautics, aircraft |
| TMB | Transportes Metropolitanos de Barcelona | In Spanish | → Spain |
| TMB | Transportation Management Bulletin | In English | |
| TMD | Transport de Matières Dangereuses | In French | |
| TMD | Transports de Marchandises Dangereuses | In French | |
| TNT | Thomas Nationwide Transport | In English | |
| TOI | Transport Okonomik Institut | In Norwegian | → Economics |
| TR | Transportation Request | In English | |
| TRB | Transport Research Board | In English | |
| TREN | TRansport et ÉNergie | In French | → Energy economics |
| TRKC | Transport Research Knowledge Centre | In English | → Documentation → Vehicle engineering |
| TRL | Transport Research Laboratory | In English | → Research institutes |
| TRT | Transportation Research Thesaurus | In English | |
| TSE | Transportation Support Equipment | In English | → Vehicle engineering |
| TSIS | Traffic Software Integrated System | In English | → Software |
| TTA | Tramway Touristique de l'Aisne (https://www.tta.be) | In French | → Rail transport → Tourism → Belgium |
| TTP | Transports Terrestres Promotion | In French | |
| TWU | Transportation Workers Union of America (www.twu.com) | In English | → Organizations and associations → Labour, labour economics → United States |
| TxDOT | Texas Department of Transportation | In English | → Regional administration → Vehicle engineering → United States |
| UAL | United Airlines (https://www.united.com) | In English | → Transport by air → United States |
| UAT | Union Aéromaritime de Transport | In French | |
| UBCNA | Union Belge Contre les Nuisances des Avions | In French | → Organizations and associations |
| UEM | Union Européenne Motocyclisme | In French | → Organizations and associations |
| UIC | Union Internationale des Chemins de fer | In French | |
| UMCPG | Union des Mutuelles des Cheminots et des Personnels du Groupe SNCF | In French | |
| UNOSTRA | Union Nationale des Organisations Syndicales de Transport Routier Automobile | In French | → Organizations and associations |
| UPCP | Union Professionnelle de la Carte Postale (www.upcp.fr) | In French | → Organizations and associations → Graphic industries, printing, publishing → Postal services → France |
| UPU | Union Postale Universelle (www.upu.int) = UPU | Universala Poŝt-Unio | In Esperanto = UPU | Universal Postal Union | In English |
In French | → Organizations and associations → United Nations → Postal services → Standardization |
| UPU | Universala Poŝt-Unio (www.upu.int) = (look above) |
In Esperanto | → Organizations and associations → United Nations → Postal services → Standardization |
| UPU | Universal Postal Union (www.upu.int) = (look above) |
In English | → Organizations and associations → United Nations → Postal services → Standardization |
| USAP | Union des Société d'Autoroutes à Péage | In French | → Organizations and associations |
| USCD | Union Sportive des Cheminots Dijonnais | In French | → Organizations and associations → Sport, physical exercises |
| USCF | Union Sportive des Cheminots de France | In French | → Organizations and associations → Sport, physical exercises → France |
| USPS | United States Postal Service (https://www.usps.com/) | In English | → Postal services → United States |
| UTA | Union de Transports Aériens | In French | → Organizations and associations |
| UTP | Union des Transports Publics | In French | → Organizations and associations |
| UTP | Unité de Transport de Personnel | In French | |
| UVP | Unité de Voiture Particulière | In French | |
| VAC | Visual Approach Chart | In English | → Geodesy, cartography → Aeronautics, aircraft |
| VAL | Véhicule Automatique Léger | In French | → Vehicle engineering |
| VASI | Visual Approach Slope Indicator | In English | → Aeronautics, aircraft → Transport by air |
| VBA | Verkehrsbeeinflussungsanlage | In German | |
| VCÖ | Verkehrsclub Österreich (www.vcoe.at) | In German | → Organizations and associations → Vehicle engineering → Austria |
| VESTA | VErsailles Sécurité routière Technologies Avancées | In French | |
| VFDB | Verband der Funkamateure in Telekommunikation und Post | In German | → Organizations and associations → Telecommunications |
| VFR | Visual Flight Rules | In English | → Transport by air |
| VHU | Véhicule Hors d'Usage | In French | → Vehicle engineering |
| VIM | Vlaams Instituut voor Mobiliteit (www.vim.be) | In Dutch | → Organizations and associations → Belgium |
| VL | Véhicule Lourd | In French | → Vehicle engineering |
| VMIS | Verkehrsmanagement und Informationssystem | In German | |
| VNF | Voies Navigables de France (www.vnf.fr) | In French | → Central administration → France |
| VOR | Verkehrsbund Ost-Region | In German | |
| VRI | Verkeersregelinstallatie | In Dutch | |
| VTC | Véhicule de Transport en Commun | In French | |
| VTI | (Statens) Väg-och Transportforskninginstitut | In Swedish | |
| VTM | Véhicule de Transport de Matériel | In French | → Vehicle engineering |
| VTMIS | Vessel Traffic Monitoring and Information Systems | In English | → Knowledge management |
| VTP | Véhicule de Transport de Personnel | In French | → Vehicle engineering |
| VTUTP | Véhicule Tout Usage et Transport de Personnel | In French | → Vehicle engineering |
| WHIST | Walloon Highway Information System for Traffic | In French | |
| ZELT | Zone Expérimentale et Laboratoire de Trafic | In French | → Regional planning |
| ZEVGA | Zeitschrift fur Eisenbahnwesen und Verkehrstechnik Glasers Annalen | In German | → Serial publications, periodicals → Vehicle engineering |
| ZIP | Zone Improvement Plan | In English | → Regional planning |
| ZKR | Zentralkommission für die Rheinschifffahrt = CCR | Centrale Commissie voor de Rijnvaart | In Dutch = CCR | Commission Centrale pour la Navigation du Rhin | In French = CCR | Central Commission for Navigation on the Rhine | In English |
In German | |
| ΟΛΠ | Οργανισμός Λιμένος Πειραιώς & | In Greek | |
| ΟΣΕ | Οργανισμός Σιδηροδρόμων Ελλάδας | In Greek | |
| БАМ | Байкало-Амурська магістраль = BAM | Bajkalo-Amoerskaja Magistral | In Dutch = BAM | Baikal-Amur Mainline | In English = BAM | Bajkalsko-amurská magistrála | In Czech = BAM | Baikal-Amur-Magistrale | In German = BAM | Baikali-Amuuri magistraalraudtee | In Estonian = BAM | Baïkal Amour Magistral | In French = BAM | Bajkalsko-amurska magistrala | In Slovenian = БАМ | Байкало-Амурская магистраль | In Russian |
In Ukrainian | |
| БАМ | Байкало-Амурская магистраль = BAM (look above) |
In Russian | |
| МИАТ | Монголын Иргэний Агаарын Тээвэр = MIAT | Mongolyn Irgenii Agaaryn Teever | In Mongolian |
In Mongolian | → Aeronautics, aircraft |