SOCIETE D'ECONOMIE MIXTE DES TRANSPORTS EN COMMUN DE L'AGGLOMERATION NANTAISE (SEMITAN)

Their core work

SEMITAN is the urban public transport operator for the Nantes metropolitan area in France, running tram lines, bus networks, and urban mobility services for hundreds of thousands of daily passengers. As a mixed-economy company (public-private structure), they sit at the intersection of public service delivery and commercial operation. In H2020, they contributed as a real-world deployment site: testing hydrogen fuel cell vehicles in active transit service within H2ME 2, and serving as part of Nantes' role as a lighthouse city in the mySMARTLife smart city programme. Their value in EU projects is operational — they provide live urban environments, fleet utilisation data, and direct experience deploying new mobility technologies at city scale.

What they specialise in

How they've shifted over time

Both of SEMITAN's H2020 projects began in 2016, so there is no genuine temporal evolution — their participation in hydrogen vehicle testing (H2ME 2) and smart city planning (mySMARTLife) was concurrent rather than sequential. The keyword split between early and recent periods reflects the two different projects rather than a shift in organisational focus. What can be said is that SEMITAN engaged EU research on two fronts simultaneously: deploying clean fuel technology in their fleet and helping shape city-wide smart transition strategies, suggesting Nantes was actively positioning itself as a model city for sustainable urban mobility.

With both projects completed by 2023 and no further H2020 activity, SEMITAN's trajectory points toward zero-emission fleet transition and city-level mobility integration — areas now central to Horizon Europe calls — making them a plausible partner for any consortium needing a French operational transit authority.

How they like to work

SEMITAN has never led an H2020 project, consistently joining as a participant or third party — the typical posture of urban transport operators who contribute real-world deployment environments rather than research capacity. Their network of 105 partners across 16 countries reflects the scale of the mySMARTLife lighthouse city consortium structure, not a network they independently built. They are best understood as an operational testbed and city-level demonstration partner, not a consortium architect.

SEMITAN's H2020 network spans 105 unique partners across 16 countries, almost entirely a consequence of mySMARTLife's large lighthouse city consortium. Their direct, independently cultivated network of repeat collaborators is likely much smaller and difficult to assess from this data alone.

What sets them apart

SEMITAN is one of the few French urban transit operators with direct H2020 participation, giving them credibility as a real-world deployment site for hydrogen mobility and smart city technologies. Unlike universities or research institutes, they bring an operational perspective — actual fleet management, passenger volumes, and service continuity constraints that research partners cannot replicate. For any consortium seeking a French city mobility partner with documented hydrogen vehicle experience, SEMITAN is a rare find.

Highlights from their portfolio

• H2ME 2
  One of the largest European hydrogen mobility demonstration programmes, where SEMITAN contributed as a live urban transit operator testing fuel cell vehicles in real service conditions, generating high-utilisation fleet data with direct relevance to zero-emission public transport transitions.
• mySMARTLife
  Nantes was selected as one of Europe's lighthouse cities for smart urban transition, placing SEMITAN at the centre of a large-scale city demonstration covering mobility, energy, and integrated urban planning — a consortium of over 100 partners across 16 countries.