Melbourne's train network is still struggling after the evacuation of Metro Trains' control centre at 7.30pm.
Train lines were all suspended for about half an hour and commuters reported some level crossings were also in lockdown.
Train services resumed about 8pm but Metro said lines were experiencing major delays. Trams were also delayed in many parts of the city after failing to cope with heavy demand.
Then at 10.45pm the Glen Waverley line faced major delays after a truck hit a rail bridge near Holmesglen Institute in Glen Waverley.
At the same time, Metro tweeted that there were still "delays and alterations" to some train services and commuters should listen for station announcements.
Metro is urging commuters to allow for extra travel time or to find alternative transport.
V/Line services were initially experiencing delays during the standstill.
However, by the time all train lines were reinstated some V/Line services were being replaced with coaches.
Your next question might be: do #MetroTrains have a backup control room?Yes. But like any Disaster Recovery site,it takes time to activate.
— Daniel Bowen (@danielbowen) November 10, 2016Melbourne, population 4m, has a train system in paralysis because a fire alarm is going off in a @metrotrains nerve centre. pic.twitter.com/IaSVPKYg1w
— Adam Carey (@adamlcarey) November 10, 2016