The Azzurra track built in 1962 is one of the first gokart racetracks in Italy Its been modified in 1985 and is a real icon in the international map of karting

What is the correctly punctuated version of this sentence?
The Azzurra track, built in 1962, is one of the first go-kart racetracks in Italy. It's been modified in 1985 and is a real icon in the international map of karting.