| Bagnoles de l'Orne | Microbus | Ville de Bagnoles-de-l'Orne | - | 02.33.37.85.66 | |
| Bandol | Bandol Bus | Ville de Bandol |  | - | - 4 bus routes
- 1 locality served
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| Bar le Duc | TUB | Syndicat Intercommunal des Transports Urbains du Barrois |  | 03.29.45.45.45 | - 4 bus routes
- 1 transport on request route
- 3 localities served
- 20 000 residents concerned
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| Bastia | Autobus Bastiais | Communauté d'Agglomération de Bastia |  | 04.95.31.06.65 | - 9 bus routes
- 2 transport on request routes
- 4 localities served
- 50 516 residents concerned
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| Bayeux | Bybus | Ville de Bayeux |  | 02.31.92.02.92 | - 3 bus routes
- 2 localities served
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| Bayonne | STAB | SMTC-Bayonne |  | 05.59.52.59.52 | - 15 bus routes
- 1 transport on request route
- 6 localities served
- 130 376 residents concerned
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| Beaune | Le Vingt | Ville de Beaune |  | 08.00.30.29.29 | - 4 bus routes
- 1 locality served
- 21 923 residents concerned
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| Beauvais | TUB | Communauté d'Agglomération du Beauvaisis |  | 03.44.45.10.11 | - 27 bus routes
- 1 transport on request route
- 3 localities served
- 67 000 residents concerned
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| Bellegarde sur Valserine | TUB | Ville de Bellegarde-sur-Valserine |  | 04.50.56.02.02 | - 7 bus routes
- 2 localities served
- 11 329 residents concerned
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| Bergerac | TUB | Ville de Bergerac |  | 05.53.74.66.66 | - 3 bus routes
- 1 locality served
- 27 201 residents concerned
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| Bernay | Bernay Bus | Ville de Bernay |  | 02.32.46.63.07 | - 2 bus routes
- 1 locality served
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| Besançon | Ginko | Communauté d'Agglomération du Grand Besançon |  | 08.25.00.22.44 | - 46 bus routes
- 3 transport on request routes
- 59 localities served
- 170 000 residents concerned
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| Béziers | Bus Occitan | Communauté d'Agglomération Béziers Méditerrannée |  | 04.67.28.36.41 | - 14 bus routes
- 1 locality served
- 103 958 residents concerned
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| Blois | TUB | Communauté d'Agglomération de Blois - Agglopolys |  | 02.54.78.15.66 | - 21 bus routes
- 1 transport on request route
- 23 localities served
- 85 000 residents concerned
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| Bolbec | TUB | Ville de Bolbec | - | 02.32.84.51.51 | - 4 bus routes
- 1 locality served
- 12 801 residents concerned
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| Bollène | TUB | Ville de Bollène | - | 08.00.32.48.33 | - 2 bus routes
- 1 locality served
- 14 288 residents concerned
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| Bordeaux | TBC | Communauté Urbaine de Bordeaux |  | 05.57.57.88.88 | - 83 bus routes
- 3 tram lines
- 2 transport on request routes
- 27 localities served
- 671 875 residents concerned
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| Boulogne sur Mer | TCRB | Communauté d'Agglomération du Boulonnais |  | 03.21.83.51.51 | - 38 bus routes
- 1 transport on request route
- 22 localities served
- 122 637 residents concerned
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| Bourg en Bresse | TUB | Communauté d'Agglomération de Bourg-en-Bresse |  | 01.74.45.05.06 | - 8 bus routes
- 8 transport on request routes
- 15 localities served
- 70 583 residents concerned
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| Bourgoin Jallieu | Ruban | Syndicat des Transports Urbains de voyageurs du Nord-Isère |  | 04.74.96.48.07 | - 7 bus routes
- 2 transport on request routes
- 6 localities served
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| Brest | bibus | Communauté Urbaine de Brest |  | 02.98.80.30.30 | - 29 bus routes
- 4 transport on request routes
- 8 localities served
- 221 600 residents concerned
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| Briançon | Transports Urbains de Briançon | Ville de Briançon |  | 04.92.20.47.10 | - 5 bus routes
- 2 transport on request routes
- 1 locality served
- 11 000 residents concerned
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| Brive la Gaillarde | STUB | Communauté d'Agglomération de Brive |  | 05.55.74.20.13 | - 9 bus routes
- 8 transport on request routes
- 15 localities served
- 58 326 residents concerned
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