The running of tram-trains directly in to Manchester, in addition to the existing rail service, has been estimated as being able to cut about 10 minutes off the overall journey time to and from Manchester. Network Rail and the Department for Transport (DfT) have indicated that they are keen to carry out a trial for tram-trains in the UK, which will be between Rotherham and Sheffield. Carrying out the trial would provide the information Network Rail and the DfT require on reliability, frequency and costs.