In 1972, Brisa was to construct of roadways by the end of 1981. The first priority was a highway designated as A1, a stretch reaching from the capital of Lisbon north to Porto, Portugal's second-largest city. This highway would become a crucial link to the industrial activity in the north of the country and experience the highest traffic volumes in Brisa's network. Construction also began on the A2, which was projected to reach from Lisbon to resort areas on the southern coast.