Complex sentence: A second definitive solution was to build the "Passante di Mestre": opened on 8 February 2009, after about 4 years and a half of works, it completely bypasses the Tangenziale di Mestre, finally separating Autostrada A4 from the local beltway.
Split into simpler sentences: A second definitive solution was to build the "Passante di Mestre": opened on 8 February 2009, after about 4 years and a half of construction. It completely bypasses the Tangenziale di Mestre, finally separating Autostrada A4 from the local beltway.