Ticket issues in Sydney, Melbourne and Perth have raised concerns over the safety of transit travellers.
The issue has seen a surge in the number of complaints, with the number recorded at more than 200 on Tuesday.
A spokesperson for the Australian Transport Safety Bureau said it was monitoring the situation closely.
“The number of reports is now up to 300 and we’re working closely with the unions to understand what is happening and how we can help improve the safety,” the spokesperson said.
ABC reporter Matt Brown visited the ATSB headquarters on Tuesday and was told the union had confirmed a total of 8,000 tickets had been issued, but did not provide any further details.
An employee from the ATC said there had been more than 400 incidents in a single day.
Ms Brown was also told that the union would not be issuing tickets in the next two days.
Labor said it would take action to stop the tickets, with transport minister Paul Fletcher telling the ABC’s RN Breakfast on Tuesday morning that a $300,000 compensation package would be made available to commuters who had experienced problems.
Mr Fletcher said there would be “no amnesty” for the unions, which had been responsible for the issue.
Transport Minister Paul Fletcher is pictured speaking to reporters in Melbourne on Wednesday.
“[They are] not going to give up, they’re not going away.
We’ve got to do something about them,” he said.
“We’ve got some options for people who are unhappy, but we’re going to have to do it.”
The union has denied claims that it was responsible for a number of the tickets.
In a statement, the union said it had made it clear that it would not issue tickets to people in breach of their union membership, including those who had travelled by train or car, or had been involved in an accident.
But Mr Fletcher defended the union’s actions and said the union was not responsible for tickets issued by drivers who had been working for the ATU.
He said the ATUS had made its decision to issue tickets in light of the “significant and complex” issue and had offered to refund the ticket holders.
Asked about the union, Mr Fletcher said it has not changed its position.
It is an issue that has been raised for some time, he said, and there will be no amnesty for drivers or drivers’ unions.
Meanwhile, a number more drivers and passengers have taken to social media to complain about the issue, with a Facebook page for a driver union has been created.
One driver, from Perth, wrote on Facebook that the issue had “put my life at risk” and that he was “furious” at the lack of action from the union.
Another driver, who did not wish to be named, said they had been driving for the union for more than 10 years and had received many complaints.
On Twitter, one passenger wrote that the “safety issue is no longer a union issue” and “driver unions are no longer the safest place in Australia”.
Another wrote: “I am sick and tired of drivers who don’t want to take responsibility for the safety that is in their drivers.
The ATSBU and other unions are responsible.”
“I am not a union member.
I am only a passenger,” another passenger wrote.
Ticket problems at Perth Airport have been a concern for some, with passengers complaining of a lack of space, staff shortages and overcrowding.
Porter said the airport’s bus services had been hit hard by the problem.
She said passengers had reported they had “had to sit in their cars and wait for an hour to be taken on a bus because they had no space”.
“That’s not right,” she said.