Raccordo autostradale 13 (RA 13; "Motorway connection 13"), also called Raccordo autostradale Sistiana-Padriciano ("Sistiana-Padriciano motorway connection"), is an autostrada (Italian for "motorway") 21.0 kilometres (13.0 mi) long in Italy located in the region of Friuli-Venezia Giulia which connects the Autostrada A4 with the Autostrada Sistiana-Rabuiese for the port of Trieste and the Trieste Airport near Padriciano [it], a hamlet of Trieste, and it is part of the so-called Grande Viabilità Triestina.

It is a part of the E70 European route.