South Wales Central AM, Andrew RT Davies, has called for an Assembly inquiry into the chaos currently being seen across the rail network in Wales.
Constituents across the region have contacted Mr Davies to express their dismay at the situation, which has seen a significant number of journeys cancelled or replaced by buses.
Commuters have been warned that the travel chaos is likely to continue for at least the next three weeks after Transport for Wales (TfW) stated that an "unprecedented" third of the network's 127 fleet are damaged.
The handover between the previous franchise holders, Arriva Trains Wales, has also been cited as an issue by the Welsh Government and TfW, with a significant number of train cancellations due to the fact that no spares were available when the handover took place, with tooling and spares taken by Arriva.
As such, Andrew RT Davies has written to the Chair of the Assembly's Economy, Infrastructure and Skills Committee, Russell George, requesting the committee considers undertaking an inquiry into the disruption.
Commenting on the fiasco, South Wales Central AM, Andrew RT Davies, said: "To say rail services across the Valley Lines network have been a shambles over the past few weeks is an understatement with severe disruption for commuters across South Wales.
"As well as severe overcrowding, there have been numerous delays and cancellations, with a lack of rolling stock to blame and no spare parts to patch up the current fleet.
"We're led to believe that around a third, possibly even up to a half of all trains in Wales are out of action, and it's clear the handover from the previous franchise holders, Arriva Trains Wales, has been poorly executed.
"This has been a very frustrating period for my constituents and many other people across Wales, and I believe this warrants a significant and substantial inquiry from the National Assembly's Economy and Infrastructure Committee.
"It has clearly been a very difficult start for Transport for Wales – and whilst immediate improvements were always unlikely – the fact the day-to-day management of services is getting worse does not bode well for future promises."
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