In the framework of a 25-year public-private partnership, Bouygues Travaux Publics and DTP are responsible for the finance, design, construction and of the Nîmes-Montpellier rail bypass, 80 kilometres of new railway which will enable passengers to travel between Paris and Montpellier in less than 3 hours. Incorporating 2 stations and 145 engineering structures, including seven viaducts, this massive project will occupy some 1,500 employees, partners and subcontractors for four years. This has been planned as a biodiversity-friendly project: compensatory measures have been proposed which will be put into effect throughout the entire duration of the contract.