Eastwood MSP, Jackson Carlaw has expressed outrage after dozens of train services in his constituency were axed after ScotRail put in place a reduced timetable.
The new timetable has been introduced in response to disagreement over staff pay and delays in the training of new drivers.
ScotRail has said that the reduction in service provision is a "temporary" change.
The hugely significant reduction in train services comes less than two months after ScotRail was nationalised on 1st April and brought under public ownership by the SNP.
As part of the unwelcome cuts, the East Kilbride to Glasgow Central train service, taking in the Eastwood stops of Busby, Clarkston, Giffnock and Thornliebank, has now reduced during the week from a twice hourly service to just one per hour between 9am to 5pm and from 6pm until 8pm.
On the Glasgow to Neilston train route, covering Patterton, Whitecraigs and Williamwood in Eastwood, local people who need to be at their place of work in the city centre for 8am are now practically unable to do so with the earliest train scheduled for 7.26 and only arriving at Central for 7.56 with delays to the service also a possibility.
The last train home from Glasgow to Neilston between Monday and Friday is now 19.35 with the later services of 20.35, 21.36, 22.05, 22.35 and 23.05 removed from the timetable.
Mr Carlaw has written to Scotrail's Service Delivery Director to raise serious concerns about the impact of the reduced services for his constituents and said the temporary timetable must not be allowed to become permanent.
Scottish Conservative MSP for Eastwood, Jackson Carlaw said:
"The SNP's nationalisation of ScotRail has started in disaster and the sheer volume of train services cancelled in Eastwood is a cause of major concern.
"The cuts are creating havoc for my constituents who require reliable and frequent trains with the availability of services between the constituency and Glasgow Central station for work, leisure and other purposes now markedly reduced.
"It is imperative for the regular timetable to be quickly reinstated and to avoid the unpalatable situation where what has been described as a temporary reduction in services could unintentionally end up as a permanent change."