Milan metro system line 4, Italy

Line 4 – also known as the Blue Line – is a metro line totally built underground, 15-km long and with 21 stations. Built by a consortium whose members include Webuild, it will connect the extreme western suburban area of Milan to Linate, the city’s airport, passing through the city centre. It will take approximately 30 minutes to get from the western suburban end line to Linate. While, from San Babila, at the heart of the city centre, it will only take 10 minutes to get to Linate.