There are now 375,000 vehicles on Irish roads without a valid NCT certificate.
The operator of the National Car Test, Applus Automotive, will today blame the problem on a range of issues, including a high level of motorists failing to show for appointments and their ageing workforce.
The Irish Independent has previously revealed how motorists in some parts of the country face waits of more than six months to secure a test appointment.
Representatives from the NCT will apologise for the backlog when they appear before the Oireachtas Transport Committee today – but they will also admit further challenges lie ahead in the coming months.
The firm will outline how there are 375,000 vehicles overdue their NCT, which they say is more than double the normal amount for the early months of the year.
The company, which will be represented at the meeting by its country manager Mark Synnott, will also outline how 3,500 people per week are not attending appointments they made for their vehicle to be tested.
Read the full report on www.independent.ie