Grand Paris Express: the largest infrastructure project currently under construction in Europe.

The Grand Paris Express is the largest infrastructure project currently under construction in Europe.

The Project owner is Société du Grand Paris. A total amount of Euro 30 billion are planned for the construction of 200 kilometres of a modern public transport network. It consists of the extension of line 14 of the metro and the construction of the new lines 15, 16, 17, 18.