The Strada statale 131 is the major road in Sardinia

Sardinia

Sardinia is the second-largest island in the Mediterranean Sea . It is an autonomous region of Italy, and the nearest land masses are the French island of Corsica, the Italian Peninsula, Sicily, Tunisia and the Spanish Balearic Islands.The name Sardinia is from the pre-Roman noun *sard[],...

, Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

. It is a freeway which connects the towns of Porto Torres

Porto Torres

Porto Torres is a comune and city in northern Sardinia, in the Province of Sassari.It is situated on the north coast about 25 km east of the Gorditanian promontory , and on the spacious bay of the Gulf of Asinara.-History:...

 and Cagliari

Cagliari

Cagliari is the capital of the island of Sardinia, a region of Italy. Cagliari's Sardinian name Casteddu literally means castle. It has about 156,000 inhabitants, or about 480,000 including the outlying townships : Elmas, Assemini, Capoterra, Selargius, Sestu, Monserrato, Quartucciu, Quartu...

 via Sassari

Sassari

Sassari is an Italian city. It is the second-largest city of Sardinia in terms of population with about 130,000 inhabitants, or about 300,000 including the greater metropolitan area...

, Macomer

Macomer

Macomer is a town and comune of Sardinia in the province of Nuoro. It is situated on the southern ascent to the central plateau of this part of Sardinia, at the junction of narrow-gauge lines branching from the main railroad line running east to Nuoro and west to Bosa.The district, especially...

 and Oristano

Oristano

Oristano is a town and comune, capital of the Province of Oristano, on the island of Sardinia, Italy. It has approximately 32,500 inhabitants.Its economy is mainly based on fishing, agriculture and, to a certain extent, tourism.-History:...

. At 229 km, it is considered the “spinal cord” of Sardinia.

It is a part of the E25

European route E25

European route E 25 is a north-south European route from Hoek van Holland in the Netherlands to Palermo in Italy which includes ferry crossings from Genoa to Bastia , from Bonifacio to Porto Torres and from Cagliari to Palermo .It passes through the following cities:Hoek van Holland –...

 European route.

History

Building works begun in 19th century, under the Kingdom of Charles Felix of Sardinia

Charles Felix of Sardinia

Charles Felix was the Duke of Savoy, Piedmont, Aosta and King of Sardinia from 1821 to 1831.-Early life:...

, the road followed the route of the ancient roman road

Roman road

The Roman roads were a vital part of the development of the Roman state, from about 500 BC through the expansion during the Roman Republic and the Roman Empire. Roman roads enabled the Romans to move armies and trade goods and to communicate. The Roman road system spanned more than 400,000 km...

 Turris Lybissonis-Caralis.

The infrastructure was modernized under fascism, and in the 1970s was rebuilt, becoming a Superstrada (Dual carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

), however it is still a second category extra-urban road, and the speed limit is 90 km/h.