The actual GRAP was built between 1963 and 2005, the south and west parts being the oldest ones, and the north and Limena parts the most recent ones.
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The Strada Regionale (Regional Road) 308, also called Nuova Strada del Santo (New Saint Road, where the Saint stands for Saint Anthony of Padua) is not usually included in the GRAP, but it is still connected to it.
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It does not run in the city area but immediately outwards, bypassing the town of Limena.