Interstate 201

Interstate 201 is a 24.5-mile auxiliary Intertate Highway bypassing Portugal's capital, Lisbon. The southern terminus is at I-1 north of Setúbal, and its northern terminus is in Loures.

Course
I-201 begins at a partial cloverleaf interchange with I-1 and PT-201 between Setúbal and Coina and traces through the southern-most areas of Portugal's Tagus River before turning to the left at an interchange with PT-33 and PT-101. I-201 passes through a toll gate before crossing the Tagus River via the Vasco de Gama Brige. I-201 enters Lisbon's northernmost suburbs, Sacavém, and then has its junction with I-1 for the second time between Lisbon and Vialonga. I-201 continues west to its northern terminus in Loures.

History
In late December 2019, the European Department of Transportation (EuroDOT) have planned to expand the Interstate Highway System into Spain and Portugal. Along with the planning of both I-1 and I-14 to serve Portugal's capital, there has been plans to build a Lisbon bypass away from the metropolitan area, and proposed Interstate 201.

The Lisbon bypass was planned to avoid the Lisbon Metropolitan Area by starting at its junction with I-1 and I-14 and continue north reaching I-1 again, somewhere north of Lisbon.

On August 12, 2020, PDOT has improved their planning of freeways around Lisbon. They relocated I-201 to go near Lisbon, but also cross the Tagus River, and added a new bypass, Interstate 601 to completely avoid the city. It would have ran the same alignment with the first proposals for I-201; It would start at its southern terminus with both I-1 and I-14, and head north towards Carregado with I-1. A month later, plans for I-601 was scraped, and instead relocated I-201, to start at I-1 and I-14 and continue northwest back to I-1 in Lisbon.

On March 10, 2021, plans for I-201 went back to the old alignment back in August 2020, and plans for another bypass was abandoned. A day later, PDOT has yet, relocated its southern terminus to its current one today, and designate PT-201 from there to the port of Setúbal.

On March 26, 2021, PDOT has announced the opening of there freeways in Portugal, alongside with I-201. They announced there freeways to be completed this year on April 2 and open on April 8.

I-201 was opened to traffic on April 8, 2021.