In March 2008 the UK Department for Transport released details of a plan to trial diesel tram-trains on the Penistone Line for two years starting in 2010.  There was no commitment to connect them to the Sheffield tram network, and in September 2009 the idea was withdrawn as it was deemed not economically viable for a trial due to the cost of the extra development required for the diesel engines to meet the forthcoming stringent EU emission regulations. Instead single-voltage electric tram-trains will be trialled between Rotherham and Sheffield . 
About 84% of adults will experience some sort of back pain in their lives.  Upper back pain, although less frequent than lower back issues, is a problem for many today. Because the thoracic spine in the upper and middle back region is not as mobile as the lower back and neck, injuries are not as common. However, upper back pain can develop due to poor posture and chronic muscle tension. If you suffer from upper back pain, then exercise,  good posture, and lifestyle changes may minimize bouts of discomfort, or even eliminate them completely.