VicRoads leader Giles Thompson has expressed regret to Victorians following ongoing difficulties with the organization's website extending into the present week. Drivers remained unable to handle vehicle registrations until at least the day before.

"At this point, every service across all platforms is working without fault," Mr Thompson stated on ABC Radio Melbourne, noting that the system enhancement had been planned for three years as part of a $300 million IT improvement program after the 2022 privatization.

Victoria stands alone among Australian states and territories in having transferred its vehicle registration and licensing operations to private hands.

"We implemented a significant system replacement and enhancement during the [June 6-8] long weekend, substituting an outdated system from the mid 1980s that had become inadequate. This transition to a new cloud-based platform over the weekend resulted in disruptions, especially affecting our online services."

The problems encompassed restricted or absent access to digital licenses, submission of roadworthy certificates, and vehicle registration capabilities, impacting both new and used vehicle transactions.

This situation prompted a new-vehicle dealer to label it an "absolute clusterf**k" since they could not hand over new cars to buyers awaiting resolution from VicRoads.

Mr Thompson conveyed his apologies, yet despite assertions that matters were fixed last week, reports indicated internal messages to staff about registration updates failing as recently as June 15.

The VicRoads executive acknowledged that the upgrade implementation would undergo evaluation.

"Clearly we encountered difficulties last week. Our customers faced substantial challenges throughout the period. It would be inaccurate to deem this a success. We deeply regret the inconveniences caused," he remarked.

During the interview, ongoing concerns were highlighted, including a vehicle appearing unregistered on the site despite credit card payment the prior day.

These disruptions have also strained VicRoads employees dealing with upset motorists reporting issues.

"Staff are informing us of continued significant difficulties," stated Tash Wark, branch secretary for the Australian Services Union.

"They are instructed to verify receipts and handle cash payments instead of electronic transfers."

Ms Wark noted a lack of support for employees amid the crisis.

"We have learned of customers shouting at our members and directing verbal abuse, even threatening consequences," she continued.

"Such instances of unacceptable conduct stem from prolonged frustration spanning more than a week without resolution or clear guidance. Employees are expected to respond with patience and understanding, which represents the extent of management direction provided."