Motorists have been caught up in peak-hour traffic chaos caused by road damage and multiple collisions on a major Melbourne freeway. All Melbourne-bound lanes of the Princes Freeway remain closed to traffic between the Princes Hwy at Werribee and Duncans Rd, after the collisions early on Wednesday morning. One of the incidents was a truck rollover and it is believed damage on the road contributed to the collisions. A metal plate covering an expansion joint in road is understood to have come loos