“Signe infini” is a monumental metal sculpture by Marta Pan. It was installed in 1993 at the intersection of the A46 and A6 motorways in Ambérieux, France. Representing a symbol of vertical infinity, the sculpture measures 25 metres (height) by 7 metres (width) by 3.70 metres (depth). To give the sculpture inertia, it was partially filled with concrete. It is considered to be Marta Pan's most visible and best-known work in France.