The new highway over the river Tagus in Lisbon, was commissioned in April 1, 1998 g - to 500-th anniversary of explorer Vasco da Gama sea route from Europe to India. Bridge - one of several large-scale construction projects on the Iberian peninsula, made in commemorate the 500 th anniversary of the discovery of America. The total length of the bridge Vasco da Gama, 17 km