Raccordo autostradale 3 (RA 3; "Motorway connection 3") or Raccordo autostradale Siena-Firenze ("Motorway connection Siena-Florence") is an autostrada (Italian for "motorway") 56.3 kilometres (35.0 mi) long in Italy located in the region of Tuscany, managed by ANAS,[2] which connects Florence to Siena.

It is a branch of the Autostrada A1.

The siding was opened in 1964.

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