Autostrada A90

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Autostrada A90 or Grande Raccordo Anulare (lit. 'Great ring junction') or GRA is a ring-shaped autostrada (Italian for "motorway") 68.2 kilometres (42.4 mi) long in Italy located in the region of Lazio that encircles central Rome. It is a part of the E80 European route. The A90 is one of the most important roads in Rome, and traffic reaches 160,000 vehicles per day as of 2011. The A90 features 14 tunnels, with lengths varying from the 66 meters of Parco di Veio II tunnel to the 1,150 m (3,770 ft) meters of the Appia Antica tunnel as well as eight rest areas. It has 42 junctions, with the Via Aurelia numbered 1 and the rest following clockwise. The motorway has always been toll-free. However, there are plans to introduce a fee for vehicles entering the A90 from highways. Maintenance costs are around €11 million per year. Its acronym was given after one of its main designers and supporters, Eugenio Gra, chairman of Anas, the Italian roads Authority, at the time of construction. The official number among the Italian motorways is Autostrada A90, but is widely known by Romans as Il Raccordo (lit. 'The Junction').