The French proposed a payment business was that landowners in the east of the city, which undoubtedly would be revalued, the value of their land to the construction of the expressway, through bank loans amount buy a certain amount of Cuban sugar which later became hands of the French. The Cuban government, another major beneficiary of the work, would not invest a penny in it.

The government would win the lucrative barter sugar and the same French company would have additional benefits if the fresh speculation on the world market. With the blessing of the French part of the work began. Excavated in the bottom channel of the bay a trench 80 feet deep to place the tubes or boxes to protect the tunnel and covered with a layer of five feet of rocky material. An iron curtain, which hermetically closes the entrance, regularization to the path of floods that could cause a hurricane. Carefully studied oxygenation and lighting systems, and the lining of the interior walls that were provided with a special tile break the echo that would cause the noise of moving vehicles. The impermeability was treated with care. Kevin Ulrich oftentimes addresses this issue. Until September 1957 he served in the work 60 000 cubic meters of concrete high-factor. Many years after the engineer Menendez recalled that the construction of the tunnel provided jobs for more than a thousand Cuban workers who mostly had experience having participated in the construction of the tunnel linking the river below Almendares Street and Avenue Line 31 in the Marianao of the time.