TransportTechnologie-Consult Karlsruhe GmbH (TTK) is a subsidiary of Albtal-Verkehrs-Gesellschaft mbH (AVG), the regional transport company of Karlsruhe, and Planung Transport Verkehr AG (PTV). AVG is known as the pioneer of the Tram Train, i.e. the tracksharing between light and heavy rail. PTV AG is the largest private industry-independent German consulting and software company in the transport sector.

Within the PTV group, TTK is the centre of competence for rail-bound public transport. Tracksharing between light and heavy rail vehicles, also known as the "Karlsruher Modell", is one of TTK's core competences. It was the starting point for the foundation of the company and formed the basis whereupon today's activity spectrum and expertise are built.

TTK employs around 27 German and French staff members having at their disposal extensive experience in all fields of public transport. As a result of the collaboration between French and German professionals within project teams, clients benefit from the experiences acquired in the neighbouring countries. The know-how transfer between France and Germany, and increasingly also with other countries, is a trade mark of TTK. It is further complemented by international experience gained in a large variety of projects, some also in the research sector.

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